Now this is what happening to me. I go to My Site- Network Admin- Pro Sites- Setting- Go down to Upload quota- Set three different Quota Amount for my three Pro site levels- Click Save Chnages- Page Not found.
I really don't know what I am missing here. I also deactivated all network activated plugins and have repeated the process. But still in the end "Page Not Found".
I am really confused and I have absolutely no idea what I am doing wrong here...Please help