@JDNSaiCharanK17193361 

The error means that Pega is trying to log in with the SystemArchitect user, but it cannot find the application called "StrategyFW_CDH:01.01.01" which is linked to this user’s access group. To fix this, go to Dev Studio and search for the SystemArchitect operator. Open it and check which access group is assigned. Then open that access group and check the application name and version. If the application "StrategyFW_CDH:01.01.01" does not exist, you can either create it or update the access group to point to an existing application. Save the changes and try logging in again. This should solve the issue.