Please upgrade to 2.3 here.
The 2.2 and earlier branches are no longer being updated.
PHP Fatal error: Class 'MediaModel' not found
This discussion is related to the FileUpload
I just got my copy of Vanilla running and extracted the FileUpload plugin. When I try to activate it, I get an error that says "PHP Fatal error: Class 'MediaModel' not found"
Does it require something else?