System menu item causes errors

Hello everybody.
When I select “system” in the Admin menu, the following items are not shown to me: RAM, logged-in users and shares. There is also the following entry in the log:
Error PHP
Invalid argument supplied for foreach() at /var/www/vhosts/… /httpdocs/cloud/apps/serverinfo/lib/OperatingSystems/DefaultOs.php#120

Otherwise everything works fine. Maybe someone can help me to fix this error.

My setup:
Nextcloud 18.0.4, CentOS 7, domains managed with plesk, php 7.2, mariadb 10.3


Thank you but this problem has already been reported here.

Thanks for the hint. Sometimes you can’t see the forest for the trees. Everything now works perfectly.