** Using WeBWorK **

Update:
After turning on debugging in the constants.pm file, this is what I found in the debug log:

[Thu Dec 16 09:33:09.217232 2021] WeBWorK::Authen::LTIAdvanced::authenticate: LTIAdvanced::authenticate request-> verify failed
[Thu Dec 16 09:33:09.217336 2021] WeBWorK::Authen::LTIAdvanced::authenticate: OAuth verification Failed
[Thu Dec 16 09:33:09.217663 2021] WeBWorK::Authen::LTIAdvanced::verify_normal_user: auth_result=|0|
[Thu Dec 16 09:33:09.218007 2021] WeBWorK::Authen::write_log_entry: Writing to login log: 'LOGIN FAILED OAuth verification failed. Check the Consumer Secret and that the URL in the LMS exactly matches the WeBWorK URL.a111a1 - authentication failed: 0 user_id=a111a1 login_type=normal credential_source=LTIAdvanced host=x.x.x.x port=62134 UA=Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.93 Safari/537.36 Edg/96.0.1054.53'.
[Thu Dec 16 09:33:09.218821 2021] WeBWorK::Authen::verify: END VERIFY
[Thu Dec 16 09:33:09.218935 2021] WeBWorK::Authen::verify: result 0
[Thu Dec 16 09:33:09.219052 2021] WeBWorK::Authen::LTIAdvanced::verify: END LTIAdvanced VERIFY