Hello Ixel,
since the new version of AUXI, OMSI doesn't want to start anymore and the error 'Unable to Initialize Steam API.' appears. But the file 'steam_api.dll' is present in the main folder. When I uninstall AUXI, OMSI works again.
The log only says:
05.12.2022 21:10:40 - WARN : Process is either not attached, no buses have been assigned or unsupported version: