Thanks for the tip! My Domoticz is now up and runnig on version 2510-1 again.

Thanks for all suggestions.
I do have plans to update both hardware and software to latest versions.As it will take some time to achieve I beleive that installing the previous version of Domotics would be an easy quick fix to get Domoticz runnig while I prepare new hardware and software.
So I still ...

Tried to update Domoticz on my Raspbian Bullseye but update crashed. By default a backup should have been created but there is none. Trying to install current domoticz version fails because bullseye have OpenSSL 1.1.x and latest domotics require OpenSSL 3.
Is there any possibility to get the ...