Signal doesn't work anymore after OS upgrade

I’ve installed the OS-upgrade (Android 10) at my Galaxy S7. Now Signal Messenger doesn’t work anymore. Immediate crash after start. Signal Update out of the /e/ repository didn’t help. What can I do?

Regain your privacy! Adopt /e/ the unGoogled mobile OS and online servicesphone

Ok, worked. Unfortunately I couldn’t backup my Signal Account and had to start anew…