If you are getting the following error after installing/upgrading/modifying Analyzer.
The server has encountered an error.
StackTrace: /analytics/Default.aspx Object reference not set to instance of an object.
This is likely due to issues in one the Analyzer configuration files (sysconfig.config, dbconfig.config, web.config). If you have modified them in any ways please go back and verify them to see if there are no miss spelling or missing begin and end markers.