This error is generally due to the global LTI tool not being set up properly in the administration area of the LMS.
- The NROC Course Manager URL may be incorrect. Did you copy/paste it? Does it have excess white space at the end or beginning? Were some characters escaped?
- Your Key and/or Secret may be incorrect. Be sure they are not in the wrong fields. Did you copy/paste them? Do they have excess white space at the end or beginning?
If your LMS does not have a global LTI tool, but rather requires setting up a tool for each individual link, you will have to check the settings for each "Unit Map" link, as well as the "Course Management and Reporting" link.