SnapCenter Backups start failing and require a SC Server reboot

All SCSQL backups stop working and you may see errors similar to the ones below, in the Event Viewer of the SC Server:

 

Log Name:      Application

Source:        SceCli

Date:          19/05/2021 15:34:27

Event ID:      1202

Task Category: None

Level:         Warning

Keywords:      Classic

User:          N/A

Computer:      SNAPCENTER.domain.com

Description:

Security policies were propagated with warning. 0x57 : The parameter is incorrect.

 

Log Name:      System

Source:        Microsoft-Windows-DistributedCOM

Date:          19/05/2021 15:55:02

Event ID:      10016

Task Category: None

Level:         Error

Keywords:      Classic

User:          MYDOMAIN\snapcenter

Computer:      SNAPCENTER.domain.com

Description:

The application-specific permission settings do not grant Local Activation permission for the COM Server application with CLSID 

{D63B10C5-BB46-4990-A94F-E40B9D520160}

and APPID {9CA88EE3-ACB7-47C8-AFC4-AB702511C276}

to the user MYDOMAIN\snapcenter SID (S-1-5-00-00000-00000-00000-000001) from address LocalHost (Using LRPC) running in the application container Unavailable SID (Unavailable).  This security permission can be modified using the Component Services administrative tool.

 

Log Name:      System

Source:        Microsoft-Windows-WAS

Date:          19/05/2021 16:03:23

Event ID:      5010

Task Category: None

Level:         Warning

Keywords:      Classic

User:          N/A

Computer:      SNAPCENTER.domain.com

Description:

A process serving application pool 'SnapCenter' failed to respond to a ping. The process id was '7576'.