Error 14004 saying "The license file is missing" occurs when upgrading the PowerServer.
Cause: This issue only exists in Appeon 6.5.1 for .NET or earlier versions. When there are server instances installed before, the server instances will not be upgraded during the upgrade process.
Solution: Use the PowerServer Instance Configuration Wizard to delete all installed instances from the PowerServer and then re-install these instances. See Installation Guide for Appeon PowerServer for detailed instructions.
