Radarr fails to use built in updater

[jef74]

I have used script to create a Radarr LCX and it wont update from its own updater.

I get the follwing in Eventlog of radarr:
Error occurred while executing task ApplicationUpdate: Access to the path '/tmp/radarr_backup/config.xml' is denied.

This is how my tmp folder looks like:

Any ideas how to resolve this?

[jef74]

I had to mount container from host and change permissions for the radarr_backup folder and then unmount container again.