This is typically due to one of the following:
1. Missing Proxy information when logging in to MSP or a setting configuration in PPM. If you previously entered proxy details in the MSP Interface, but then did a reinstall or upgrade of the MSP Interface, the proxy details will need to be entered again post install of the MSP Interface.
2. This issue can also happen if LDAP is configured and External Authentication is unchecked for the user in Clarity PPM.