I have some people testing a new course reporting:
WeBWorK has encountered warnings while processing your request. If this occured
when viewing a problem, it was likely caused by an error or ambiguity in that
problem. Otherwise, it may indicate a problem with the WeBWorK system itself.
If you are a student, report these warnings to your professor to have them
corrected. If you are a professor, please consult the warning output below for
Use of uninitialized value in string ne at /opt/webwork/webwork2/lib/WeBWorK/Authen/LTIAdvanced.pm line 731.
And other people the same course is fine. I have compared the LTI debug Canvas injection to webwork but didn't find a variable left empty that might be the cause.
Can someone suggest an approach to track down my data issue please?