tl;dr
when will be the fixed android version released?? doesn't matter where, I just want to be productive 
hi, I have the same problem since I update the f-droid App.
I'm a little bit ... shocked? How is this possible, that an app-version can be released which instantly drops an error, literally at the first opening after updating within unter one minute ...? this feels like .. it hasn't been even tested
As I can see, the github issue is marked as fixed ... cool.
And now ..? I know, it is my mistake to update that quick, as the provided apk Version at the joplin download page ist 3.0.7 and playstore seems to have 3.0.8 which all are working fine, but downgrading isn't possible with the .apk and after using the app for over a year and trusting, I didn't noticed that fast that sync isn't working and now ... Im sure that I am not the only one who literally can not manage many tasks and notes with other clients.