Login Error

When we try to login in the IdentityManager with user and password I get below error.


An exception has occurred while executing the form method F0_ctl00_Main_Main_ControlRef1_Button1_Method.

Could not load file or assembly 'QBM.AppServer.Indexing.Plugin' or one of its dependencies. The system cannot find the file specified.

And when I login in AppServer there are no menu.

Could anyone tell us how to fix it?

Thank you in advanced.