Grades are not being updated in Canvas using the Advanced LTI
The apache error_log has this entry every 5 minutes:
[Fri Jan 19 09:17:45 2018] [error] [client 188.8.131.52] An error occurred while trying to update grades via LTI: Can't call method "getSettingValue" on an undefined value at /opt/webwork/webwork2/lib/WeBWorK/Authen/LTIAdvanced/SubmitGrade.pm line 297.
Line 297 in /opt/webwork/webwork2/lib/WeBWorK/Authen/LTIAdvanced/SubmitGrade.pm is
my $lastUpdate = $db->getSettingValue('LTILastUpdate') // 0;
We are running version $WW_VERSION = 'WeBWorK-2.13';
Is there some setting that I forgot to do to make this work?
I am using this setting in the authen_LTI.conf file:
$LTIGradeMode = "homework";