Debian upgrade on Beronet Appliance

[Barnabas Sillo]

I tryed to upgrade the Debian 8 to 9 on a Beronet Appliance device but it allways failed. In the log file :
/usr/bin/env: bash
: No such file or directory

I also did a manual update of the debian 8 but it did not help. The 3CX was installed from the Beronet market (ISO) and no changes were made, only the usual updates from the 3CX system management page.
Now I have 3CX 15.5.15502.6 on Debain 8
Any idea?

 

[complex1]

Perform a backup and store on a safe place, install from 3CX ISO and restore backup.

https://www.3cx.com/docs/manual/installing-debian-linux-pbx/