Canvas - Invalid Client Error in LTI Tools - Updated (5/4/26)

Posted: 2026-05-01 09:51:37   Expiration: 2026-05-08 09:51:37

Some LTI tools within Canvas were experiencing errors.

Update 5/4/26

As of Friday 5/1 around 2:00pm, the originally identified integrations were resolved and confirmed working.  Since that time, Turnitin has been identified as having impact.  There is a stand alone News Item for Turnitin

https://kb.wisc.edu/luwmad/news.php?id=14124

Original Outage Description

Users may be experiencing issues accessing LTI tools, such as Atomic Assessments, TidyUP, UDoIT, and DesignPLUS.

This issue has been reported to Instructure (Canvas vendor), and their technologists are currently working on correcting the problem.

Instructure has posted to their status page on this issue here. We will update this news item with more information when it's available.

Original Impact to Users

Some tools integrated in Canvas are giving the error message: {"error":"invalid_client","error_description":"unknown client"}

Workarounds

There are no known workarounds at this time.

 

-- Learn@UW: Susan Sloan