Apps from other than Apple on an iPhone, ie most of the apps you use daily, do not start in certain cases if you have synchronized your iPhone with an Apple Silicon machine.
iPhone formatting may be the only solution so far
We have not heard of this error before, nor experienced it as we have not synced to our MacBook Air M1, but the problem has been there since December last year - the computers were launched a month earlier.
Unlucky iPhone owners have reported the issue on Reddit and Apple Support Forums.
It is not possible to start other apps than Apple, nor is it possible to update installed apps from the App Store.
The M1 computers herp the app data on the iPhone
The worst thing is that there is no good solution to this. It is probably possible to roll back to an iOS backup before connecting the computer to an M1 Mac. It is also a solution to synchronize with macOS Catalina and maybe also older versions, but the chance that you have such a machine lying around is not very great maybe.
We do not yet know when Apple intends to fix the bug, and there are no indications that macOS Big Sur 11.2 will fix the bug.
According to a Reddit account that experienced the problem, Apple told him that this is a problem with the information being corrupted when syncing. The problem is also current on the iPad. Apple's senior developers are reportedly looking into the issue, according to the same user, but this has not been confirmed.