LTI Deep Linking Response message issue - INVALID JWT

Premkumar.V.1876

I am getting

Invalid deep linking response from the tool: Invalid JWT. Please contact your Brightspace Administrator.

when I am sending the deep link response message back to the platform from my tool. I have this same integration working with other LMS platforms. I have seen couple of similar issues in this community but did not find a solution in the same threads. If someone has a solution could you please share.

Below is the deeplink response message (replaced some values with random string),

{
"aud": "https://testingxyz.d2l-partners.brightspace.com",
"iss": "llll-51d6-4a89-a82c-3b0918551dc5",
"jti": "dGtigFYwNL0COJuvUMGnVJT44tDgh182",
"exp": 1750059360,
"iat": 1750059060,
"nbf": 1750059055,
"nonce": "b504BLZFlU81g95ttyCZQlD5bDO3/pjTSLE1UuOgiwzb4AE4-jjjxyz",
"https://purl.imsglobal.org/spec/lti/claim/message_type": "LtiDeepLinkingResponse",
"https://purl.imsglobal.org/spec/lti/claim/version": "1.3.0",
"https://purl.imsglobal.org/spec/lti/claim/deployment_id": "kkjkjkjk-klk-452a-b4ed-df94d64fa47d",
"https://purl.imsglobal.org/spec/lti-dl/claim/data": "fsdfdsfdsffdsfdsfdsfdsfdsfddddddd~",
"https://purl.imsglobal.org/spec/lti-dl/claim/msg": "Success.",
"https://purl.imsglobal.org/spec/lti-dl/claim/content_items": [
{
"type": "ltiResourceLink",
"title": "Example",
"text": "Test",
"url": "https://xyz.com/toolset?id=3085",
"lineItem": {
"scoreMaximum": 100,
"label": "abcd",
"resourceId": "123",
"tag": "xyzlineitem",
"gradesReleased": "true"
},
"available": null,
"submission": {
"startDateTime": "2025-06-09T07:29:00Z",
"endDateTime": "2025-06-26T07:29:00Z"
},
"custom": {

"xyz_resourceID": "123",

"availableSDateTime": "$ResourceLink.available.startDateTime",
"availableEDateTime": "$ResourceLink.available.endDateTime",
"submissionSDateTime": "$ResourceLink.submission.startDateTime",
"submissionEDateTime": "$ResourceLink.submission.endDateTime"
},
"window": {
"targetName": "xyz"
}
}
]
}

Ashwin.R.60

Hello @Premkumar.V.1876

Thank you for reaching out to the Brightspace Community.

Based on your description, further investigation is needed. I recommend opening a support case with additional details to assist us in investigating further.

Regards

Ashwin