KSC 12.2.0.4376 Download update to server repository

[faheem.ibraheem]

Unable to download KSC update to the Server Repository. As per the Kaspersky all the URLs  given on https://support.kaspersky.com/common/start/6105 are added in the exception on Proxy and accessible from browser but nothing worked in update task. Update task stuck on 0% or 54% for 2 or 3 days 

Already Tried:

Upgraded to latest KSC “12.2.0.4376”

Clear the Update repository 

Deleted the task and again tried

Kaspersky Update utility ends up with error “signature files are not valid”

Please guide how can i resolve the issue.