Hi there! I see you're encountering the error message "this method is not available" when trying to download anime episodes using the Anilab app on your Android 10 device. Let's work together to get this sorted out.

First, could you tell me if this happens with all episodes or just specific ones? Also, are you downloading over Wi-Fi or mobile data? Any additional details will help me pinpoint the issue.

In the meantime, here are some general steps to try:

1. Check App Updates: Make sure the Anilab app is updated to the latest version. Sometimes download methods get updated or changed, and older versions might not support them.

2. Restart the App: Close the app completely and reopen it. This can sometimes refresh the download functionality.

3. Clear App Cache: Go to your device's Settings > Apps > Anilab > Storage, then clear the cache. This removes temporary files that might be causing issues without deleting your data.

4. Check Permissions: Ensure the app has the needed permissions for storage access. In Settings > Apps > Anilab > Permissions, storage should be enabled.

5. Try Reinstalling: If the above don't work, uninstall and reinstall the Anilab app. This can fix corrupted files which might prevent downloads.

6. Network Check: Switching from mobile data to Wi-Fi or vice versa might help, especially if the download method depends on network types.

If after these, the problem persists, it might be related to the app's download method compatibility or temporary server-side changes. Let me know what happens after trying these, and if possible, share the exact steps you take before the error appears.

Are you satisfied with this approach so far?

This downloading issue is happened to all the episode and anime series and I am downloading my episodes with Wi-Fi and mobile network also.

Thanks for the extra details! Since the download issue occurs with all episodes and across both Wi-Fi and mobile networks, it seems like a broader problem than a local network or individual file issue.

From what I see, there have been recent reports across user forums (like Reddit) mentioning that the source website behind the Anilab app experienced downtime due to DMCA (copyright) actions. This caused the download option inside the Anilab app to stop working universally for many users, not just on certain devices or connections1.

Here is what I recommend next:

1. Verify App Version: Make sure you are running the latest version of Anilab. Sometimes updates include fixes or alternative download methods.

2. Check for Official Announcements: Visit the official Anilab website or social media channels for any updates or notices regarding this issue.

3. Try Alternative Download Methods: Some users have suggested switching to an external downloader by enabling that option in the app’s settings (if available). This approach routes downloads differently and may restore functionality6.

4. Wait and Monitor: Since this issue relates to server-side or copyright restrictions, it might be temporary. The developers may work on a fix or alternative hosting.

5. Explore Other Apps: If urgent offline viewing is needed, you could temporarily try other anime streaming apps that support downloads as a workaround.

It looks like the "this method is not available" error is tied to changes on the service side rather than your device or network. If you want, I can guide you on trying the external downloader option or help explore alternatives.

Are you satisfied with these recommendations so far? Would you like me to assist with enabling the external downloader or checking for the latest app version?