I have updated my OMV 4 to the current version 5.4.2-1 with the following short instructions.
Afterwards I can log in to the Web-GUI, but there I see 2x OMV extras. One of them works, the other one generates an RPC error message. This error message also appears when I go to the System Information section.
In the console I get an error message regarding 'omv.deploy.monit.services.collectd' with the omv-salt commands for nginx and phpfpm.
I have reinstalled both omextras and openmediavault with all plugins. I also cleared the GUI cache with omv-firstaid and also cleared the cache in my browser. OMV-Update did not solve both problems either. Nothing suitable is logged in the syslog.
What else can I do to make both problems disappear?