502 Grade Sync Error with Aspire

[MaryEtherington]

I am trying to do a typical grade sync from Canvas to Aspire/SIS, but it continues to fail with a 502 status code when clicking on the "Sync SIS Categories" option under "Assignments."  I emailed Canvas and have not heard back.  I called the Canvas Support Hotline and was told it was a server error on the Aspire/SIS side and that there was no solution or time frame.  I would like to know if anyone else has had this issue and if you were able to get it resolved.  Thank you!