This error appears when your app has expired or when your device cannot reach Apple's verification servers. To fix expired apps, refresh them through AltStore or Sideloadly while connected to your computer.
How to Download the Best YouTube IPA File for iOS 10.3.4 Finding a working YouTube app for iOS 10.3.4 can be challenging. Apple discontinued support for this firmware years ago. The official App Store version no longer connects to YouTube servers on older devices like the iPhone 5 or iPad 4.
If you try to download YouTube from the App Store on iOS 10.3.4, you will usually encounter one of two issues: An error stating the app is incompatible with your device.
For iOS 10.3.4, you typically need an older version of the YouTube app (often around version 12.x to 14.x) that can still communicate with Google's servers after minor modifications.
Save the changes, exit Filza, and force-close the YouTube app.