Updated to 255 - server not starting

[skonrad]

Server ist not starting after todays update.

The arkserver.log has following output regarding the error:

/usr/local/bin/arkmanager: line 641: ulimit: open files: cannot modify limit: Operation not permitted
15:10:40: Running /ark/server/ShooterGame/Binaries/Linux/ShooterGameServer TheIsland\?MaxPlayers=20\?Port=7777\?QueryPort=27015\?RCONEnabled=True\?RCONPort=32330\?ServerAdminPassword=adminpassword\?ServerPassword=intense\?SessionName=Camo\'s\ Island\?listen -log
/ark/server/ShooterGame/Binaries/Linux/ShooterGameServer: error while loading shared libraries: libsteam_api.so: cannot open shared object file: No such file or directory
15:10:40: Server PID: 396
15:10:45: Bad PID ''; expected '396'
15:10:45: exited with status 0

Even after fixing the libsteam_api.so-issue, the problem provails. Pulling latest docker-image yields not update whatsoever.
Completely destroying and starting the server with docker-compose down -v and docker-compose up -d does not fix the issue either.

Any idea on how to fix this?

Thx in advance.

EDIT:
The ulimit-issue was no problem in the past.