When i do restore i have this error :
Backend not supported: box
I dont have error on backup.
Hey Astate, that sounds super odd!
Could you try exporting your configuration for us to see? Perhaps it’s some specific setting that causes this error 
Edit: some documentation in case you’re unsure Using the Graphical User Interface - Duplicati 2 User's Manual
This is my configuration
mono /opt/duplicati-latest/Duplicati.CommandLine.exe backup box://Backup_Pc /home/myuser/.bash_history /home/myuser/.bash_profile /home/myuser/.bashrc /home/myuser/.config/ /home/myuser/.fonts/ /home/myuser/.mozilla/ /mnt/DATAONE/ --backup-name=Pc_Backup_Box --dbpath=/home/myuser/.config/Duplicati/77768282729075868489.sqlite --encryption-module=aes --compression-module=zip --dblock-size=50mb --retention-policy=“1W:1D,4W:1W,12M:1M” --exclude-files-attributes=temporary --disable-module=console-password-input --exclude=“site-packages/” --exclude=/home/myuser/.config/Duplicati/ --exclude=/mnt/DATAONE/ISO-VM/