| Error Message | Cause | Solution | | :--- | :--- | :--- | | | The APK is corrupted or built for a newer Android version. | Redownload the file. Ensure it’s exactly version 17.09.35 and not a newer build. | | "App not installed. An existing package by the same name with a conflicting signature is already installed." | You have a newer YouTube version installed (even if it doesn’t run). | Go to Settings > Apps > All > YouTube > Uninstall updates (or Uninstall completely). Then try again. | | "Insufficient storage available." | Your /system or /data partition is full. | Clear cache and delete old apps. Move media to an SD card. Then retry. | | "YouTube keeps stopping" after login. | Corrupt app data or cache. | Go to Settings > Apps > YouTube > Clear Data and Clear Cache. Then reopen the app. | | "Can't connect to the server - Retry" | The legacy version’s API endpoint is outdated. | Close the app fully (swipe away from recents), enable Airplane Mode for 5 seconds, then disable Airplane Mode. Retry. |
: You can find archived versions (specifically versions around 14.x or earlier ) on reputable sites like