# Troubleshooting

This page is for when you encounter a problem with a source or the app.

# What are some common issues?

Java.lang Exception: Failed to bypass Cloudflare
HTTP error 403
HTTP error 404
HTTP error 429 (Too Many Requests)
HTTP error 5xx
HTTP error 1006
HTTP error 1020
Unable to resolve host / Connection failed / Failed to connect to / timeout / connection reset
java.security.cert.CertPathValidatorException / Chain validation failed
App not installed
Attempt to invoke virtual method 'com.hippo.unifile...
Cannot Access SD Card
Storage issues with Android 11+
Slow loading
Reading is laggy

If error-specific instructions didn't help or your error isn't on the list, go through Diagnosis.

# Diagnosis

  • Verify your extensions are up to date (
    explore
    Browse
    Extensions, make sure no extensions have an Update button).
  • Check if Tachiyomi has an update (
    more_horiz
    More
    info
    About
    then tap Check for updates).
  • Manually refresh the manga you are having issues with by dragging down.
  • Check other manga from the source.
  • Verify that WebView is updated.
  • Try opening the manga in
    public
    WebView
    . If there is a Cloudflare protection, wait for it to load. If there is a CAPTCHA, solve it and see if it helped.
  • Change your internet connection (switch to Wi-Fi, mobile data or a VPN, use a "What's my IP" site to confirm your IP has changed), then try again.
  • Ask other users to try the action that gives you the error.
  • Check if the source is either down, or is having issues in a browser.
  • Press the retry button in the middle of your manga page if one exists.
  • Try the following at
    more_horiz
    More
    settings
    Settings
    code
    Advanced
    • Clear Cache
    • Clear Cookies
    • Clear Database
    • DNS over HTTPS
  • If your downloads are getting stuck, try deleting the queue and trying again.
  • Force close Tachiyomi and reopen it.

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. If it is not just you, go to everyone is having this problem.

If none of these solutions help, try asking in our Discord Server (opens new window). Check #status-updates first to see if your issue is known. State your app version and the source, manga, and chapter with the problem if it is not listed.

# It only happens to me

You may be getting a 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) 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 manga in your library from the source.

The above are imprecise and fuzzy rules because each site has its non-public limits and triggers.

# Everyone is having this problem

If the site is reachable and fully functional, there may be an issue with the extension or app.

  1. Have a look at open issues for the app (opens new window) and/or extensions (opens new window).
  2. It may have been fixed already but not released yet, so look at closed issues (app (opens new window) / extensions (opens new window)) issues as well.
  3. If you can't find the issue there, open a new one.

If the site is not reachable or has issues, all you can do is wait for the site to become functional again.

# Solving Cloudflare issues

Cloudflare is an anti-bot mechanism. Some sources intentionally have a higher Cloudflare protection level to block apps like Tachiyomi. You can try the following suggestions to help resolve Cloudflare challenges. If they don't work, migrate to other sources or wait until they lower their protection.

# Loading the website in WebView

Try to load the website in WebView. Note that WebView is not the same as using your browser.

How to open WebView

  1. Go to
    explore
    Browse
    in the bottom navbar.
  2. Press the source you would like to access.
  3. Press the
    public
    WebView
    icon in the top toolbar.
  4. Complete a CAPTCHA if one is shown.
  5. Once done, press the X at the top left to return.

You may need to try this multiple times. You can also try pressing the

more_vert
Overflow icon, opening the website in your regular browser, then checking for a CAPTCHA there.

Some sources may have more advanced Cloudflare protection. If you are facing issues, try the following options.

# Clearing WebView data

GUIDE

  1. In the
    public
    WebView
    screen, try "Clear cookies" then "Refresh" from the
    more_vert
    Overflow
    menu.
  2. Go to
    more_horiz
    More
    in the bottom navbar, then
    settings
    Settings
    code
    Advanced
    , then select "Clear WebView data".

# Changing your user agent

A user agent string helps websites identify information about the requester. While some sources have user agent strings set, most rely on the default value set in the app.

GUIDE

  1. Go to
    more_horiz
    More
    in the bottom navbar, then
    settings
    Settings
    code
    Advanced
    .
  2. Change the Default user agent string setting to a different one. This website (opens new window) is a decent reference.
  3. Restart the app and try accessing the source again.

# Update WebView

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:

Users on Android 7.0 and up can also see and change WebView implementation in Developer Options (opens new window).

Non-standard implementations like Firefox can lead to Tachiyomi not working correctly or, in the worst-case, crash. We recommend to setting your WebView implementation to Android System WebView (opens new window) or Google Chrome (opens new window).

# Unable to install the app or extensions

Try installing Split APK Installer (opens new window) 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.

INSTALL_FAILED_UPDATE_INCOMPATIBLE: Package eu.kanade.tachiyomi signatures do not match the previously installed version; ignoring!
DISPLAY_NAME column is null
INSTALL_FAILED_NO_MATCHING_ABIS

# Getting Logcats and Crash Logs

To dump crash logs following an app crash, go to

more_horiz
More
settings
Settings
code
Advanced
Dump crash logs

To get device logs if the app is not behaving as expected, record device logs using a Logcat Reader (opens new window).