After passing 2FA app is stuck on "Please verify your facebook account" screen. Clicking continue does nothing. Restart of app forces reinserting credentials but again its stuck.

happens to me too. workaround is to switch off 2FA, and turn it back on when Caprine has logged in
Not sure if this is a bug with Caprine and/or Facebook, but got caught in this as well... I recently hit "log out of all sessions" as a security precaution after changing my passphrase, and enabling 2FA, this was the odd man out, so to speak.
Ok thanks for tip. Actually it somehow passed this screen after couple of restarts. Weird.
I was able to get past continue to the 2FA screen. But after I did that, I just got back to this screen again.
Same on my end on Kubuntu 20.04
Same problem on ubuntu with caprine.
I don't call that a fix. It's a workaround at best.
I was able to get around the issue by temporarily disabling 2FA... though this isn't a great fix.
This seems to be related to FB either interfering with, or being less familiar with the Agent being used. It might be worthwhile to just use a user agent that matches or closely aligns with Chrome.
same happening here
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happens to me too. workaround is to switch off 2FA, and turn it back on when Caprine has logged in