Hi Christopher
Having the same problem here with the Edwiser plugin, I tried the fix mentioned above, but in my case I am still having the issue. String Locator plugin flags the session_start() function as also being in the edwiser-multiple-users-course-purchase plugin too so that is probably the cause of the error still showing.
Unfortunately I don’t speak PHP though, so it might take me a while to figure it out, but if I do will post back here in case it helps others.
Andy
