An embedded page at smc-service-cloud.respondus2.com says: Request to fix the exam settings failed. Please contact the system administrator.
The above error can occur if you have locked your course and/or exam (common for Canvas blueprint courses) and you then attempt to click on a "fix it" button in the LockDown Browser Dashboard.
Because the quiz is locked, the LockDown Browser Dashboard cannot make the necessary changes to the quiz, and the error results. Unlocking the quiz in the course master will likely be necessary in order to resolve the problem.