L am german speaker and i haved used virtmin long time without problemd.
Now i have installed :

System hostname srv.syte.fr ( Operating system Debian Linux 8
Webmin version 1.760 Virtualmin version 4.17.gpl
Processor information Intel® Celeron® CPU 2.66GHz, 1 cores System uptime 23 hours, 12 minutes
Running processes 159 CPU load averages 0.27 (1 min) 0.35 (5 mins) 0.45 (15 mins)
CPU usage 0% user, 10% kernel, 2% IO, 88% idle
Real memory 659.50 MB used, 1005.68 MB total
Virtual memory 30.29 MB used, 2.05 GB total
Local disk space 5.12 GB used, 919.44 GB total
Package updates All installed packages are up to date

when I want to make new server i got allways this message: :

Creating administration group zzzzz …
… done

Creating administration user zzzzz …
… done

Failed to create virtual server : setquota: Not all specified mountpoints are using quota.

what can I do now

mfg .s.eberwein