When running an Out-of-the-box (OOTB) report from Home > Advanced Reporting or Reports and jobs, the following error is received:
RPT-0023: The user does not exist on reporting server or incorrect login credentials or server may be down. Please contact your system administrator.
The Clarity user could not be authenticated in the Jaspersoft users database.
Component: Clarity Jaspersoft Reporting
If you are seeing this issue post upgrading, see the below from Post-Upgrade Folder Level and User Level Security
After the upgrade, the folder-level or user-level security can get reset by the installer.
Note: After the folder-level access has been changed, run the "Create and Update Jaspersoft Users" Job
If the above doesn't help, perform the below steps: