After applying yesterday all the Windows Updates offered for September Patch Tuesday, the "Computer Monitoring Error" disappeared from this morning's Health Report (I run mine at 9:00am daily).
We'll see if it continues. But it seems the most recent patches fixed this.
What got installed:
2021-09 Servicing Stack Update for Windows Server 2016 for x64-based Systems (KB5005698)
2021-09 Cumulative Update for Windows Server 2016 for x64-based Systems (KB5005573)
Windows Malicious Software Removal Tool x64 - v5.92 (KB890830)
Windows Malicious Software Removal Tool x64 - v5.93 (KB890830)