Quota Upload Song Issue - Maxed Quota Error After Deleting All Songs
Using Jamroom
Try reloading the jrChangeOwner module and the jrProfile module from the tool in the MARKETPLACE -> TOOLS -> RELOAD MODULES.
The error is saying something that is expected to be there is not there. Looks to me as if that function is not in our current code base, so I expect it has been removed/replaced with something else in the next version and I suspect you're in a state where the core is in front of that module.