When trying to access an IT Analytics report (any), the error "Errors in the metadata manager" occurs. Directly accessing reports on the Analysis Server or Reporting Server may work, however.
Server Error in '/Altiris/ITAnalytics' Application.
Errors in the metadata manager. An error occurred when loading the <CUBE_NAME> cube, from the file, '<PATH_TO_SQL_ANALYSIS_DB>\<FILE_NAME>.xml'
The Microsoft SQL Sever Analysis Database has become corrupted due to issues on the SQL Server, specifically, the specified corrupted or missing OLAP xml file.
Manually delete all Analysis database files that are related to IT Analytics and then create a new Analysis database in IT Analytics. The following article describes how to do this:
How to reset the Microsoft SQL Server Analysis Server database file folder
Error "Server Error in '/Altiris/ITAnalytics' Application" occurs when trying to open the IT Analytics Configuration page
Error "Exception: A task with Guid is already running." appears in the IT Analytics Event Viewer