Hello again, I tried again, but no luck. I was using a complete fresh install of the latest nightly (LibreELEC-RPi5.aarch64-13.0-nightly-20240521-97bf23c), all I configured was ssh to access the host and select the hifiberry in the "System:Audio:Audio output device" section.
The URL is https://paste.libreelec.tv/sunny-egret.log
And thank you very much for your effort!
Regards
Lotte