Improvements to Troubleshooting

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---
title: Common issues
description: This page is for when you encounter a problem with a source or the app.
description: Facing issues with a source or the app? Here's how to tackle common challenges.
---
# Common issues
This page is for when you encounter a problem with a source or the app.
Facing issues with a source or the app?
Here's how to tackle common challenges.
## Basic issues
### Cannot Access SD Card
The `Cannot Access SD Card` error can sometimes be fixed by changing the location of your downloads to somewhere else and back to the SD card, then restarting the app.
Having a file or folder name that is too long can also cause this issue.
Android's file manager does not support filenames longer than 255 characters.
If you know the file or folder name that is the culprit, you can connect your SD card to your computer and shorten it.
Otherwise, delete the Tachiyomi downloads folder off of the SD Card.
### `Cannot Access SD Card`
* Temporarily switch download location from SD card, then revert and restart the app.
* Long filenames trigger this. Android file manager doesn't support **>255** characters.
* If known, shorten the file/folder name via computer when SD card is connected.
* Else, delete **Tachiyomi** downloads folder on SD card.
### Storage issues with Android 11+
See [this](/docs/faq/application/android-11+) section of the FAQ to learn how Scoped Storage affects Tachiyomi in Android 11+ and how to fix it.
See [this](/docs/faq/application/android-11+) section of the FAQ to learn how Scoped Storage affects **Tachiyomi** in **Android 11+** and how to fix it.
### Slow loading
If any sources are slow, it is likely due to the site being slow, your internet being slow, or a rate limit applied to the source to reduce the load or IP bans.
Sources being slow could stem from site slowness, your internet, or source-imposed rate limits/IP bans.
### Reading is laggy
This is usually due to the images in the chapters being too long or large for the reader to handle.
If you turn have **32-bit color** on, try turning it off under **More -> Settings -> Reader**.
This helps sometimes to free up some RAM being used.
To eliminate this issue, find a different source that cuts the chapter into more pieces or downscales the images.
* Caused by oversized images in chapters.
* For **32-bit color** users, try disabling in **More -> Settings -> Reader**.
* Free up RAM.
* Use sources with smaller images.
### App not installed
Refer to this section.
Refer to "[Unable to install the app or extensions](/docs/guides/troubleshooting/#app-or-extension-installation-issues)" section.
## Advanced errors
### Java.lang Exception: Failed to bypass Cloudflare
`Java.lang.Exception: Failed to bypass Cloudflare` means that the source you selected has Cloudflare protection on, refer to the Cloudflare guide to fix it.
If the solutions provided do not fix the issue, the source has likely raised the Cloudflare protection level high enough that Tachiyomi is not able to access the site.
### Unable to resolve host / Connection failed / Failed to connect to / timeout / connection reset
Errors like `Unable to resolve host`, `Connection failed`, `Failed to connect to`, `timeout`, `connection reset` mean that something is preventing you from connecting to the source.
### `Java.lang Exception: Failed to bypass Cloudflare`
This error indicates the selected source is protected by **Cloudflare**.
Possible reasons include:
Consult the [Cloudflare guide](/docs/guides/troubleshooting/#cloudflare) for solutions.
If issues persist, the source might have high **Cloudflare** protection.
* Your internet connection is not good enough to connect.
* The app does not have access to the internet.
### `Unable to resolve host` / `Connection failed` / `Failed to connect to` / `timeout` / `connection reset`
These errors indicate connection issues. Possible causes include:
* Weak internet connection.
* App lacks internet access.
* Your ISP has blocked the site.
* The site is down.
Try the following solutions to fix this issue:
Try these solutions:
* Enable **More -> Settings -> Advanced -> DNS over HTTPS**.
* Use a different internet connection (switch to Wi-Fi, a different Wi-Fi network, mobile data or a VPN).
* Reboot your router.
* Change network (Wi-Fi, mobile data, VPN).
* Reboot router.
### java.security.cert.CertPathValidatorException / Chain validation failed
`java.security.cert.CertPathValidatorException` or `Chain validation failed` means there is a problem with validating source's sertificate.
### `java.security.cert.CertPathValidatorException` / `Chain validation failed`
Validation issue with source's certificate.
* Check if the site's certificate has expired.
Use an online service for checking SSL certificates.
If the certificate has expired, wait while the site owner to renew it.
* Ensure that you have the right date and time set on your phone.
* Try **More -> Settings -> Advanced** then try **Clear cache** and **Clear cookies**.
* Try using a different internet connection (switch to Wi-Fi, a different Wi-Fi network, mobile data or a VPN).
* Try restarting the device.
Try these solutions:
### Attempt to invoke virtual method 'com.hippo.unifile...'
The `Attempt to invoke virtual method' com.hippo.unifile...` error can be caused by various reasons, but they all have to do with storage.
* Check expired certificate, use SSL checker.
* Set correct device date and time.
* In **More -> Settings -> Advanced**, try **Clear cache** and **Clear cookies**.
* Change network (Wi-Fi, mobile data, VPN).
* Reboot device.
* Most commonly, it is caused by full storage.
Check to see if your device or SD Card is full.
* Check if **Tachiyomi** has access to the SD card.
You can enable it in Android settings for app permissions.
* If you're downloading and this error pops up, that means the app might not be able to access the folder you're trying to download to.
This may be because the folder is corrupted or does not exist.
Use a file manager to check that the folder(s) exist and every folder in the sequence is available and accessible.
* The drive you're writing to is corrupted.
Check using a file manager to see if it is accessible.
### `Attempt to invoke virtual method 'com.hippo.unifile...'`
Storage-related error causes:
* Storage full, check device/SD Card.
* Grant **Tachiyomi** SD card access in Android settings.
* Download folder access issues, validate paths.
* Corrupted or inaccessible writing drive, verify using a file manager.
## HTTP errors
Encountering HTTP errors? Here's what they mean and how to address them.
### HTTP Error: 403
Possible reasons for `HTTP error 403`:
* The source you selected has Cloudflare protection on, refer to the Cloudflare guide to fix it.
* The source is down, removed the series, or banned your IP.
> Open WebView to check if this is the case.
### `HTTP Error: 403` - Forbidden
Possible reasons for this error:
* The selected source has Cloudflare protection. Check the [Cloudflare guide](/docs/guides/troubleshooting/#cloudflare) for solutions.
* The source might be down, removed the series, or banned your IP.
> Open WebView to confirm.
### HTTP Error: 404
`HTTP error 404` probably means that the source is down or removed the series.
Open WevView to check if this is the case.
Migrate to a different source for this series if you'd like.
### `HTTP Error: 404` - Not Found
This error likely indicates a down source or removed series.
* Use **WebView** to verify.
> Consider switching to a different source for the series.
### HTTP Error: 429 - Too Many Requests
`HTTP error 429` or `Too Many Requests` means that the source banned your IP address (in most cases, it's temporary) because you could be downloading or reading too fast
We suggest [reporting](https://github.com/tachiyomiorg/tachiyomi-extensions/issues/new/choose) the issue so that a rate limit can be added to prevent IP bans in the future.
### `HTTP Error: 429` - Too Many Requests
This error suggests the source temporarily banned your IP due to fast downloads/reads.
### HTTP Error: 5xx
`HTTP error 5xx` like `500`, `502`, and others are server-side errors, and the source you are trying to access has problems on their side.
Open the source in WebView and check if the site is down.
[Report the issue](https://github.com/tachiyomiorg/tachiyomi-extensions/issues/new/choose) to add rate limits and prevent future IP bans.
### HTTP Error: 1006
`HTTP error 1006` means that the source has banned your IP address (in most cases, it's temporary).
### `HTTP Error: 5xx`
Errors like `500`, `502`, etc., indicate server-side issues on the source's end.
### HTTP Error: 1020
`HTTP error 1020` means that you have violated a firewall rule the site owner has put up.
This usually means that the site owner has raised the Cloudflare protection level or that the site owner is blocking IPs outside their country.
[Check the source in WebView](/docs/guides/troubleshooting/#accessing-websites-via-webview) to confirm if it's down.
### `HTTP Error: 1006`
This error means a temporary IP ban by the source.
### `HTTP Error: 1020`
This error points to violating a firewall rule set by the site owner.
The owner might raise Cloudflare protection or block IPs from outside their country.
::: warning
If error-specific instructions did not help or your error is not on the list, go through **Diagnosis**.
For unlisted errors or if instructions don't help, refer to [Diagnosis](/docs/guides/troubleshooting/diagnosis).
:::

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---
title: Diagnosis
description: This page is for when you encounter a problem with a source or the app.
description: Facing issues with a source or the app? Follow these steps to troubleshoot and find solutions.
---
# Diagnosis
This page is for when you encounter a problem with a source or the app.
Facing issues with a source or the app?
Follow these steps to troubleshoot and find solutions.
## Main diagnosis
## Primary diagnosis
### Update Your Extensions
- Go to **Browse -> Extensions**, ensure no extensions have an **Update** button.
### Update Your App
- Navigate to **More -> About** and tap **Check for updates**.
### Manual Series Refresh
- Drag down to manually refresh problematic series.
### Test Other Series
- Try different series from the same source.
### Update WebView
- Ensure your WebView is up to date.
### Use Public WebView
- Attempt opening series in public WebView.
> Wait for CAPTCHA or Cloudflare protection if needed.
### Change Connection
- Switch networks (Wi-Fi, mobile data, VPN) and confirm IP change.
### Ask Others
- Get others to replicate the error.
### Source Status
- Verify source's status in a browser.
### Retry Button
- Look for retry button on series page.
### Advanced Settings
- Go to **More -> Settings -> Advanced** and try any of the below:
1. **Update Extensions**: Check **Browse -> Extensions** for updates, no pending updates should be present.
1. **Update App**: Go to **More -> About** and tap **Check for updates**.
1. **Manual Series Refresh**: Drag down to manually refresh problematic series.
1. **Test Other Series**: Try different series from the same source.
1. **Update WebView**: Ensure your WebView is current.
1. **Public WebView**: Attempt opening series in public WebView. Wait for CAPTCHA or Cloudflare protection if needed.
1. **Change Connection**: Switch networks (Wi-Fi, mobile data, VPN) and confirm IP change.
1. **Collaborative Check**: Get others to replicate the error.
1. **Source Status**: Verify the source's status in a browser.
1. **Retry Button**: Look for a retry button on the series page.
1. **Advanced Settings**: Under **More -> Settings -> Advanced**, try these options:
- Clear Cache
- Clear Cookies
- Clear Database
- DNS over HTTPS
1. **Download Issues**: Delete the queue and retry downloads.
1. **Restart Tachiyomi**: Force close and reopen the app.
### Download Issues
- Delete queue, retry downloads.
### Restart Tachiyomi
- Force close and reopen app.
::: tip
An extension update may fix your issue.
Wait or check for an extension update if you have not already.
> There are no ETAs for updates.
:::
If any of these solutions help, go to [it only happens to me](#it-only-happens-to-me).
If it is not just you, go to [everyone is having this problem](https://tachiyomi.org/help/guides/troubleshooting/#everyone-is-having-this-problem).
If any of these solutions help, go to [Personalized Issue](#personalized-issue).
If it is not just you, go to [Widespread Issue](#widespread-issue).
If none of these solutions help, try asking in our [Discord server](https://discord.gg/tachiyomi).
Check **#status-updates** first to see if your issue is known.
Check [#status-updates](https://discord.com/channels/349436576037732353/738862409284059239) first to see if your issue is known.
State your app version and the source, series, and chapter with the problem if it is not listed.
## It only happens to me
You may be getting a [Cloudflare](/docs/guides/troubleshooting/#cloudflare) protection, may have been IP-banned, or encountered some other counter-measure that website owners deploy against programs like Tachiyomi.
If that is the case, there is probably nothing that Tachiyomi can do to solve it.
Some of them (like [Cloudflare](/docs/guides/troubleshooting/#cloudflare)) have to be manually solved, and some are temporary (IP bans).
**Workarounds that can the lower chance of an issue happening again:**
- Don't use downloads with the source.
- Have less series in your library from the source.
::: warning
The above are imprecise and fuzzy rules because each site has its non-public limits and triggers.
::: tip An extension update may fix your issue
Wait or check for an extension update if you have not already.
There are no ETAs for updates.
:::
## Everyone is having this problem
If the site is reachable and fully functional, there may be an issue with the extension or app.
## Personalized Issue
If you're the only one facing a problem, you might be encountering [Cloudflare](/docs/guides/troubleshooting/#cloudflare) protection, an IP ban, or other countermeasures set by website owners against programs like **Tachiyomi**.
1. Have a look at open issues [for the app](https://github.com/tachiyomiorg/tachiyomi/issues) and/or [**extensions**](https://github.com/tachiyomiorg/tachiyomi-extensions/issues).
1. It may have been fixed already but not released yet, so look at closed issues ([app](https://github.com/tachiyomiorg/tachiyomi/issues?q=is%3Aissue+is%3Aclosed)/[extensions](https://github.com/tachiyomiorg/tachiyomi-extensions/issues?q=is%3Aissue+is%3Aclosed)) issues as well.
1. If you can't find the issue there, open a new one.
**To minimize future issues:**
* Avoid using downloads with the source.
* Reduce the number of series in your library from that source.
> If the site is not reachable or has issues, all you can do is wait for the site to become functional again.
::: warning
These are general guidelines as each site has its specific undisclosed limits and triggers.
:::
## Widespread Issue
When everyone experiences a problem, it could be with the extension or app:
1. Check open issues [for the app](https://github.com/tachiyomiorg/tachiyomi/issues) and/or [**extensions**](https://github.com/tachiyomiorg/tachiyomi-extensions/issues).
1. Check closed issues ([app](https://github.com/tachiyomiorg/tachiyomi/issues?q=is%3Aissue+is%3Aclosed)/[extensions](https://github.com/tachiyomiorg/tachiyomi-extensions/issues?q=is%3Aissue+is%3Aclosed)) in case it's resolved but not yet released.
1. If not found, create a new issue.
::: warning
If the site itself is problematic, patience is the only solution until it becomes functional again.
:::

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---
title: Troubleshooting
description: This page is for when you encounter a problem with a source or the app.
description: Facing source or app issues? Here's how to troubleshoot.
---
# Troubleshooting
This page is for when you encounter a problem with a source or the app.
Facing source or app issues?
Here's how to troubleshoot.
## WebView
### Loading the website in WebView
Try to load the website in **WebView**.
> Note that WebView is not the same as using your browser.
### Accessing Websites via WebView
::: tip How to open WebView
1. Go to **Browse** in the bottom navbar.
1. Press the source you would like to access.
1. Press the **WebView** icon in the top toolbar.
::: tabs
== Using Browse
1. Open **Browse** from the bottom navbar.
1. Tap the desired source.
1. Tap the **WebView** icon in the top toolbar.
1. Complete a **CAPTCHA** if one is shown.
1. Once done, press the X at the top left to return.
1. Close by tapping `X` at the top-left.
== Using Series
1. Open a series.
1. Tap the **WebView** icon button.
1. Complete a **CAPTCHA** if one is shown.
1. Close by tapping `X` at the top-left.
:::
You may need to try this multiple times.
You can also try pressing the **Overflow** icon, opening the website in your regular browser, then checking for a **CAPTCHA** there.
Repeat if needed.
Alternatively, try opening the website in your browser using the **Overflow** icon and solve any **CAPTCHA** there.
Some sources may have more advanced **Cloudflare** protection.
If you are facing issues, try the following options.
![Open WebView](/docs/guides/troubleshooting/open-webview.dark.webp =1079x520)
### Clearing cookies and WebView data
::: tip Guide
1. Go to **More -> Settings -> Advanced**.
1. Press **Clear cookies**.
1. Press **Clear WebView data**.
::: info Clearing cookies and WebView data
1. Navigate to **More -> Settings -> Advanced**.
1. Tap **Clear cookies**.
1. Tap **Clear WebView data**.
:::
### Update WebView
### WebView Update
To update WebView, you need to find what WebView implementation is used on your device.
In general, default implementation depends on the Android version as follows:
- Android 10.0 and up - [Android System WebView](https://play.google.com/store/apps/details?id=com.google.android.webview).
- Android from 7.0 to 9.0 - [Google Chrome](https://play.google.com/store/apps/details?id=com.android.chrome).
- Android 6.0.1 and below - [Android System WebView](https://play.google.com/store/apps/details?id=com.google.android.webview).
::: tip
Users on Android 7.0 and up can also see and change WebView implementation in [Developer Options](https://developer.android.com/studio/debug/dev-options).
::: tabs
== Android 10 and above
[Android System WebView](https://play.google.com/store/apps/details?id=com.google.android.webview)
== Android 7-9
[Google Chrome](https://play.google.com/store/apps/details?id=com.android.chrome)
== Android 6 and below
[Android System WebView](https://play.google.com/store/apps/details?id=com.google.android.webview)
:::
::: warning
Non-standard implementations like Firefox can lead to Tachiyomi not working correctly or, in the worst-case, crash.
It is recommended to set your WebView implementation to [Android System WebView](https://play.google.com/store/apps/details?id=com.google.android.webview) or [Google Chrome](https://play.google.com/store/apps/details?id=com.android.chrome).
::: tip **Android 7** and above
Newer Android users can check/change WebView in [Developer Options](https://developer.android.com/studio/debug/dev-options).
:::
::: warning Caution with Non-Standard WebView
Using non-standard WebView (like Firefox) might cause Tachiyomi malfunction or crashes.
It's best to choose [Android System WebView](https://play.google.com/store/apps/details?id=com.google.android.webview) or [Google Chrome](https://play.google.com/store/apps/details?id=com.android.chrome).
:::
## Cloudflare
### Solving Cloudflare issues
Cloudflare is an anti-bot mechanism.
Some sources intentionally have a higher Cloudflare protection level to block apps like Tachiyomi.
**Cloudflare**, an anti-bot mechanism, is used by some sources.
Some sources intentionally have higher **Cloudflare** protection to deter apps like **Tachiyomi**.
You can try the following suggestions to help resolve Cloudflare challenges.
> If none of these help, wait until they lower their protection or migrate to other sources.
## Misc
### Dealing with Cloudflare Looping
Certain sources may employ more advanced **Cloudflare** protection, leading to WebView continuously loading when bypassing using the above solution.
If this occurs, try [Accessing the Website via WebView](#accessing-websites-via-webview).
### Changing your user agent
A user agent string helps websites identify information about the requester.
This information may impact Cloudflare's bot detection.
While some sources have user agent strings set, most rely on the default value set in the app.
A user agent string shares requester information with websites, potentially affecting **Cloudflare**'s bot detection.
While some sources have specific user agent strings, most rely on the app's default.
::: tip Guide
1. Go to **More -> Settings -> Advanced**.
1. Change the **Default user agent string** setting to a different one.
> [This website](https://www.whatismybrowser.com/guides/the-latest-user-agent/) is a decent reference.
1. Restart the app and try accessing the source again.
::: info Changing your user agent
1. Navigate to **More -> Settings -> Advanced**.
2. Modify **Default user agent string** to another value.
> [Here's a reference](https://www.whatismybrowser.com/guides/the-latest-user-agent/).
3. Restart the app and retry source access.
:::
### Unable to install the app or extensions
Try installing [Split APK Installer](https://play.google.com/store/apps/details?id=com.aefyr.sai) from the Google Play Store, then use it to try and install the affected APK.
**Split APK Installer** will tell you why the APK is uninstallable, or it will install the APK for you.
Some common errors are listed below.
::: details INSTALL_FAILED_UPDATE_INCOMPATIBLE: Package eu.kanade.tachiyomi signatures do not match the previously installed version; ignoring!
If **Split APK Installer** outputs the above error when attempting to install the APK, you are likely installing a official build over an existing **F-Droid** build.
The **F-Droid** build has a different signature than the official build, so you must backup your data, uninstall the app, then restore the data in a fresh install.
::: tip Did these methods not work?
Wait for the source to lower its protection or switch to different sources.
:::
::: details DISPLAY_NAME column is null
If **Split APK Installer** outputs `DISPLAY_NAME column is null`, the APK you have downloaded is corrupted.
Some users experience this error multiple times after redownloading the APK, so keep redownloading the APK until it installs correctly.
:::
## General
::: details INSTALL_FAILED_NO_MATCHING_ABIS
If **Split APK Installer** outputs `INSTALL_FAILED_NO_MATCHING_ABIS`, the APK you have downloaded is the wrong one for your CPU architecture.
Download the correct one or download the universal APK if you are not aware which CPU architecture your device uses.
:::
### Obtaining Logcats
To diagnose abnormal app behavior, record device logs using a [Logcat Reader](https://play.google.com/store/apps/details?id=com.dp.logcatapp).
### Getting Logcats and Crash Logs
To dump crash logs following an app crash, go to **More -> Settings -> Advanced -> Dump crash logs**.
### Obtaining Crash Logs
For crash investigations, navigate to **More -> Settings -> Advanced** and tap **Dump crash logs**.
![Dump crashlogs](/docs/guides/troubleshooting/dump-crash-logs.dark.webp =512x386)
To get device logs if the app is not behaving as expected, record device logs using a [Logcat Reader](https://play.google.com/store/apps/details?id=com.dp.logcatapp).
### App or Extension Installation Issues
Problematic with app or extension installation?
Follow these steps:
1. Install [Split APK Installer](https://play.google.com/store/apps/details?id=com.aefyr.sai) from Google Play Store.
1. Utilize it to install the `.apk`.
**Split APK Installer** clarifies issues or successfully installs.
Common errors include:
::: details `INSTALL_FAILED_UPDATE_INCOMPATIBLE: Package eu.kanade.tachiyomi signatures do not match the previously installed version; ignoring!`
Seeing this error while installing the `.apk` over an existing **F-Droid** build indicates a mismatch in signatures.
Data backup, uninstall, and fresh installation are required.
:::
::: details `DISPLAY_NAME column is null`
Seeing this error points to a corrupted `.apk`.
Redownload repeatedly to resolve.
:::
::: details `INSTALL_FAILED_NO_MATCHING_ABIS`
Seeing this error suggests the `.apk` is incompatible with your CPU architecture.
Obtain the appropriate version or a universal `.apk`.
:::

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