Urbackupclientbackend.service filed

root@srv02.centos8.web:# sudo systemctl status urbackupclientbackend.service
● urbackupclientbackend.service - UrBackup Client backend
   Loaded: loaded (/usr/lib/systemd/system/urbackupclientbackend.service; enabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since Thu 2023-04-13 16:25:49 CEST; 2s ago
  Process: 2384 ExecStart=/usr/local/sbin/urbackupclientbackend --config /etc/sysconfig/urbackupclient --no-consoletime (code=exited, status=2)
 Main PID: 2384 (code=exited, status=2)

apr 13 16:25:48 srv02.centos8.web systemd[1]: Started UrBackup Client backend.
apr 13 16:25:49 srv02.centos8.web urbackupclientbackend[2384]: ERROR: Internet server not configured. Please configure "internet_server".
apr 13 16:25:49 srv02.centos8.web systemd[1]: urbackupclientbackend.service: Main process exited, code=exited, status=2/INVALIDARGUMENT
apr 13 16:25:49 srv02.centos8.web systemd[1]: urbackupclientbackend.service: Failed with result 'exit-code'.