Common Solution:

• There is a forbidden character in one of your movie files/folders ("<>|:/\"&?*" are illegal characters).

Error log detail

Title: Error
Message: Object reference not set to an instance of an object.
StackTrace:    at EmberAPI.Scanner.ScanSourceDir(String sSource, String sPath, Boolean bRecur, Boolean bUseFolder, Boolean bSingle, Boolean doScan)
Date/Time: 
===========================================================================================