The user exists according to the canvas api:
And that user is in the course roster:
while(1);[{"id":4247772,"name":"Derek","sortable_name":"Derek","short_name":"Derek","login_id":"11@11"},{"id":4491930,"name":"
1...@11.com","sortable_name":"
x...@11.com","short_name":"
1...@11.com","login_id":"
x...@11.com"},{"id":4041918,"name":"Bryan Holladay","sortable_name":"Holladay, Bryan","short_name":"Bryan Holladay","login_id":"
1...@11.com"},{"id":4238388,"name":"Bryan Holladay","sortable_name":"Holladay, Bryan","short_name":"Bryan Holladay","login_id":"
1...@11.com"},{"id":4247770,"name":"Derek Ramsey","sortable_name":"Ramsey, Derek","short_name":"Derek Ramsey","login_id":"
1...@11.com"}]
I manually graded a different user and that shows up fine in the submissions list for that course/assignment/user:
while(1);[{"assignment_id":3649294,"attempt":null,"body":null,"excused":false,"grade":"1","grade_matches_current_submission":true,"graded_at":"2015-07-06T23:28:22Z","grader_id":4041918,"id":27798247,"score":1,"submission_type":null,"submitted_at":null,"url":null,"user_id":4491930,"workflow_state":"graded","late":false,"preview_url":"
https://canvas.instructure.com/courses/903453/assignments/3649294/submissions/4491930?preview=1\u0026version=1"}]
The issue is with posting a new grade and or comment to a submission that hasn’t been created. This worked in the past and has just recently changed.