u/duolight_anybody

The error as shown in the image keeps showing up when i try to use check50 on this particular problem set , i have been facing this issue for over a week. Checks and submissions on other psets work just fine(it worked on fiftyville) and i can use submit50 on this pset. The submission appears in gradebook, but it is not graded and the problem doesnt show as completed. The answers for all 13 queries is correct as manually verified by me. In the status page it shows all systems are operational, Please help!!