Grade passback not working with H5P

[ayub02]

Background

H5P is a tool that allows users to create interactive content and then embed it into their LMSes using LTI 1.1 and 1.3.

This github issue is about a problem i've encountered while testing H5P integration with Open edX Ulmo sandbox via LTI 1.3 + Advantage.

Problem

When a user (learner) attempts as assessment in H5P tool from within Open edX, the tool displays a warning "Your gradebook did not confirm receiving this attempt".

As expected, the grades in Progress tab do not change which confirms that the platform was unable to receive grades from the tool.

I shared a HAR file with H5P technical support team (attached). Correspond screen recording is attached.

H5P then shared a response to HAR file from their devs which i'm copying below (see email conversation for context):

Here's what our devs found:

We are making the request to retrieve the line items:

GET "https://ulmo.openedx.io/api/lti_consumer/v1/lti/3/lti-ags?resource_link_id=block-v1:edx+LTI101+2026+type@lti_consumer+block@ff4f12d57abc480eb2a3ec89eacb165a"
Authorization: "Bearer {$access_token}"
Accept: "application/vnd.ims.lis.v2.lineitemcontainer+json"

The result we get is:

500 Internal Server Error
The response body is the default HTML page for the OpenEdX front page. No specifics of the error are visible.

We believe that you'll need to check your application or web server error log to determine what’s wrong here; it’s not exposed to us.

har file as text.txt

Screen.Recording.2026-02-04.at.2.53.35.PM.mov

Conversation with H5P.pdf

Goal

Goal of this ticket is to identify the exact issue and suggest remedies.

Steps to reproduce

Please follow the integration procedure outlined in this document. Connect with @ayub02 for any help.

https://openedx.atlassian.net/wiki/spaces/COMM/pages/5542707201/Guide+H5P+1.3+integration+Needs+update

[navinkarkera]

Update: I was not able to reproduce this issue locally in the master branch, so it is possible that the issue is already fixed in master.

@ayub02 plans to test this again in a master sandbox and come back with the results.

[ayub02]

@navinkarkera i configured on master sandbox (link). Facing the same issue.

[Faraz32123]

closing this issue in favor of this PR #607.

[ayub02]

@navinkarkera i tested grade pass back on Master sandbox just now. It seems to be working because:

1. I didn't see the warning after submission.
2. Progress page shows that the grade was changed.

I am looking forward to your guidance on whether or not you or someone else needs to test this as well, since it was difficult to reproduce.

I've attached the screenshots below.

cc: @Faraz32123

[navinkarkera]

@ayub02 I did test it multiple times and I believe @Faraz32123 also did some testing.

[ayub02]

Sounds good. I'm closing this issue. Thank you both for working on this.

[ayub02]

Related PRs:

1. fix: quote resource_link_id properly as it is used in url by tools #607
2. fix: parsing resource_link_id and allowing empty resource_id #609