After Upgrading to 20.2 CAPC Shows No Navigation Bar
navigation bar missing
no drop down menus
Release : 20.2
Component : CA Performance Center
In this case a mySql database was loaded from a prior version. During upgrades there may be database updates and conversions you cannot load a mySql database from a different version of CAPC.
Versions of CAPC must be the same to move a database between installations.