SOLVED: Server Manager 2012 : Configuration refresh failed with the following error: Invalid class

If your various Microsoft consoles are failing to function you might need to reregister some files.  In my case I found that FILE SERVER RESOURCE MANAGER MMC would load but say it could not connect. another person found that their FAILOVER CLUSTER MANAGER MMC had errors AND I found that the SERVER MANAGER DASHBOARD had a red flag indicating the REFRESH FAILED.  When I clicked MORE I saw the image to the right:

There are two solution I have found to these errors:

1 – Refresh .MOFs:

1. Launch a CMD PROMPT (ADMIN)  – make sure it is as an Admin
2. type cd C:\Windows\System32\wbem\AutoRecover
3. type for /f %s in (‘dir /b *.mof *.mfl’) do mofcomp %s’
4. Launch your SERVER MANAGER and let it take the minute or two it needs to start up.

I found information on this fix HERE and HERE.

2 – Remove Old/Dead Machines From Server Manager:

1. Launch SERVER MANAGER
2. Click ALLSERVERS
3. Right Click on any old or dead servers and select REMOVE.

That’s it!