# Troubleshooting

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

# What are some common errors?

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

Java.lang Exception: Challenge not found
Java.lang Exception: Failed to bypass Cloudflare
Loader not implemented
HTTP error 403
HTTP error 404
HTTP error 429 (Too Many Requests)
HTTP error 5xx
Unable to resolve host / Connection failed
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

# Diagnosis

  • Verify your extensions are up to date (
    Anime Extensions/Manga Extensions, make sure no extensions have an Update button).
  • Check if Aniyomi has an update (
    then tap Check for updates).
  • Verify that WebView is updated.
  • Try opening the manga in
    . 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
    • Clear Cache
    • Clear Cookies
    • Clear Database
    • DNS over HTTPS
  • If your downloads are getting stuck, try deleting the queue and trying again.
  • Force close Aniyomi and reopen it.

The Preview version may have already fixed your issue. Just wait for a new Stable release.

If any of these solutions help, go to it only happens to me. If it's 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). State your app version and the source, manga, and chapter with the problem.

# 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 Aniyomi. If that is the case, there is probably nothing that Aniyomi 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 very 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 Aniyomi extensions (opens new window) for anime exetnsion and check Tachiyomi extensions (opens new window)for manga extension.
  2. It may have been fixed already but not released yet, so look at closed issues (app (opens new window) / Aniyomi extensions (opens new window) / Tachiyomi 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 the Cloudflare issue

Please note that WebView is not the same as using your browser.

You must solve the Cloudflare issue in WebView.

How to open WebView

  1. Go to
    in the bottom navbar.
  2. Press the source you would like to access.
  3. Press the
  4. Complete the CAPTCHA if one is present.
  5. Once done, press the X at the top left to return.

# Bypassing Cloudflare looping

Some sources may have more advanced Cloudflare protection, that results in infinite loading in WebView when trying to bypass Cloudflare using the solution above. If you are facing this issue, try the following steps:


  1. Go to
    in the bottom navbar.
  2. Press the source you would like to access.
  3. Press the
    icon. Refer to the previous picture.
  4. Press the
    icon and then press Open in Browser.
  5. Once done, press the X at the top left and return to the source.
  6. Press the
    icon again.
  7. Complete the CAPTCHA if one is present.

# 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 Aniyomi not working correctly or, in the worst-case crash. We recommend to set 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.

# Getting Logcats and Crash Logs

To dump crash logs following an app crash, go to

Dump Crash Logs

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