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LTI invalid signatures

Question asked by Matt Lewis on Sep 24, 2015
Latest reply on Sep 28, 2015 by Matt Lewis

I have an LTI that is throwing an error. The error is "Invalid signature".  The odd part is this is only happening in one course.  All other courses I've added the tool to are running fine.

 

To authenticate, I'm using the ims-blti client for php (IMS Global Developer).

 

Anyone with some troubleshooting suggestions on why for an individual course the signatures wouldn't match?

 

thanks

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