Files are not backed up in Jottacloud (bluet/jottacloud:latest)

Hello everyone
I tried to set up the bluet:jottacloud:latest container in Docker on my Synology rack station. Logging into Jottacloud seems to work. In any case, the device name can be seen there. Unfortunately, neither files nor directories are synchronized.
Does anyone have any advice for me? What did I wrong?

Details of the container and VOLUME-Settings:

I don’t know if the execution command (Ausführungsbefehl) is correct. I didn’t find any information about this. (/src/entrypoint.sh docker run bluet/jottacloud)
also the PATH (/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/var/lib/jottad) Is this correct?

What screenshots are helpfull? As a new member I only can upload one picture…

Thanks a lot for your help.

Best regards
Fritz