PROBLEM:
If you get error in SharePoint 2010 most of them are generic like this one, where only thing we can see is Correlation ID.
SOLUTION:
To see the real error and pin point the real problem you have to
- Copy the Correlation ID from the error message
- Run SharePoint 2010 Management Shell
- Run the following command with your Correlation ID
get-splogevent | ?{$_.Correlation -eq "CORRELATION ID"} | select Area, Category, Level, EventID, Message |Format-List