• The cloud connector connectivity test fails.
• Run sfc /scannow in Administrator Command Prompt to check for corrupt files.

• Cloud Connector automatic upgrade executed by Citrix DaaS failed and the CCs entered a hung state.
• After reinstalling the Cloud connector, the connectivity test is stuck.
• Ran sfc /scannnow in Administrator Command Prompt and found corrupt files.
• Ran dism /online /cleanup-image /restorehealth 
• Checked the CBS logs at C:\Windows\Logs\CBS to get more information about the kind of corruption.
• Any installation or upgrade would probably fail when there are Manifest and Payload corruptions at the OS level.
• Need to update the Windows patch to fix the corruptions or manually fix the corruptions.

Problem Cause

-The cloud connector upgrade failed due to OS corruptions. 

-The Windows patching is not up-to-date.