[Georges]

Removing all permissions and notifications and choosing deny access to data usage on digital well being app fixed my crashes.

Hi & thanks for your message, but I don't even have the "Digital Wellbeing"-App on my Meswao-Tablet. 
Did you try to follow my described steps in order to reproduce/cross-check the malfunction, I described in my post? Is the error not occuring on your tablet?

My crashes were random, and stopped when I essentially disabled that one app which was pre installed in the ROM on my US tablet. I would try your steps, but I no longer have this tablet. But I never had a crash when accessing settings as in your example. 

In any case, my suspicion is that some low level app that runs continuously in the background is the culprit. Not sure what app that might be on the German version. But it's an app that monitors how long you use that tablet and has parental controls settings to limit usage.

Thanks for sharing your experiences. Anyone else around here, who's still using the Meswao-Tablet and who could cross-check my error-description or has a solution?

I have the same problem: not a single app can be opened from Settings -->Apps