I have two Moodle 3.3.5 instances but the course grade doesn't sync to the LTI customer from the LTI provider.
Current course grade for user 94 is from the course 44 is 318,00 = Natural of the all rated activites.
enrol_lti\task\sync_grades gives an error:
Execute scheduled task: Publish as LTI tool grade sync (enrol_lti\task\sync_grades) ... started 10:46:09.
Current memory use 16.6Mt.
Starting - Grade sync for shared tool '1' for the course '44'.
Failed - The grade '0.51290322580645' for the user '94' in the tool '1' for the course '44' failed to send.
Skipping - Invalid grade for the user '92' in the tool '1' for the course '44'. Completed - Synced grades for tool '1' in the course '44'.
Processed 2 users; sent 0 grades. ... used 10 dbqueries ... used 30.015266895294
seconds Scheduled task complete: Publish as LTI tool grade sync (enrol_lti\task\sync_grades)