This issue is resolved as of 11:03am ET. We apologize for any inconvenience that may have caused you and thank you for your patience while Canvas engineers worked towards full resolution. For more information about this error and a specific resolution timeline, please see the Canvas Incident Report for this issue.
At approximately 10:23pm ET on September 22, Canvas began experiencing an issue with its document preview tool. As a result, some users may have experienced "502 page errors" when previewing files in Canvas. Though Canvas engineers have applied a fix, some users may still experience page errors. If you run into page errors, we recommend downloading the file to view its content instead. We apologize for any inconvenience that this may cause you and thank you for your patience while Canvas engineers continue to work towards full resolution. For more information about this error and a specific resolution timeline, please see the Canvas Incident Report for this issue.