I have used Canvas A LOT over the past 8 years and have a LARGE number of assignments in my Canvas Sandbox. When I try to access my assignments in my Canvas Sandbox, I get the "spinning wheel" while Canvas is trying to load the assignments. Then, I get a message that says, "Page Unresponsive. You can wait for it to become responsive or exit the page." I can't do anything except exit Canvas as my assignments never finish loading so that I can open/view them. I would like to go in and delete some obsolete assignments, but I can't even do that.
Can anyone advise? I don't want to have to create another Sandbox and lose the assignments I have in my original Sandbox.
I went back to my first course in Fall of 2012, then checked several others from the 12/13 academic year - both concluded courses and not concluded courses, and I could not reproduce your error.
Have you submitted a support ticket?
Have you tried your school's Beta and Test instances of Canvas?
I am at a loss to help you,