Could not find a part of the path

Product:
Cognos Controller 10.4.2
Microsoft Windows 2019 server

Issue:
When you login to cognos controller client, you get a error message of this kind;

Number: 76
Source: mscorlib
Description: Could not find a part of the path ‘C:\Users\nnnnn\AppData\Roaming\Cognos\CCR\ADMdb_cognoscontroller.local,1433CognosControllerdatabase’.
at Microsoft.VisualBasic.ErrObject.Raise(Int32 Number, Object Source, Object Description, Object HelpFile, Object HelpContext)
at Cognos.Controller.Common.RaiseErrCli.RaiseError(Int32 lErrNo, String sErrSource, String sErrDesc, String sErrHelpFile, Int32 lErrHelpContext)
at Cognos.Controller.Common.RaiseErrCli.RaiseError(Int32 lErrNo, String sErrSource, String sErrDesc)

Suggested Solution:

Click OK to get past the error message, and still login to Cognos Controller Client program.

Clear the local cache by going to Maintain – Special Utilities – Clear Local Cache.

Close Cognos Controller program and try to login again. Did the error go away?

Can be garbage in the cache of files in folder C:\Users\nnnn\AppData\Roaming\Cognos\ccr, that are cleared by this action.

More Information:

https://www.ibm.com/support/pages/standard-error-76-could-not-find-part-path-when-launching-controller