Failed to process deep linking response

Penghai.Z.480

Hi all, I am a developer of a LTI tool provider. I have created a new external learning tool with LTI 1.3 and used the tool to launch our tool, but when I send a deep linking response back to Brightspace, I get an error saying the JWT is invalid.

I have checked the LTI 1.3 spec again and I can confirm the JWT has all the required claims and `kid` is in the header.

In the System Log page, I can see many logs about this error, the they do not tell me why the JWT is invalid. For example, in log `#49641854298852801919166365830573535949445044843751407730.0`, the log just says "Error processing deep linking return".


And lastly, this is how the JWT looks like.

Header:
{
"kid": "46492169-27ad-4f99-a233-9cb0a444529e",
"typ": "JWT",
"alg": "RS256"
}

Payload:
{
"aud": "https://edalex.d2l-partners.brightspace.com",
"https://purl.imsglobal.org/spec/lti/claim/message_type": "LtiDeepLinkingResponse",
"nbf": 1687908969,
"https://purl.imsglobal.org/spec/lti/claim/deployment_id": "03859e2a-49bb-45c8-94ed-fb1890bba5b5",
"azp": "fb926228-6667-4b91-bd36-51beaffa9b64",
"https://purl.imsglobal.org/spec/lti/claim/version": "1.3.0",
"https://purl.imsglobal.org/spec/lti-dl/claim/content_items": [],
"iss": "fb926228-6667-4b91-bd36-51beaffa9b64",
"exp": 1687909029,
"iat": 1687908969,
"nonce": "a00066b488a81d8f2d858dc05f93e889",
"https://purl.imsglobal.org/spec/lti-dl/claim/data": "4p1G5bwfmknF1UIhjpn-DpNgVvUCmVh7uSJ7xmB9HbQ~"
}

Any comment or idea is appreciated!!!

Rusha.S.831

Hello @Penghai.Z.480,

Thank you for contacting us via Brightspace Community!

May I suggest you open a support ticket with us for us to further investigate this issue, please?

Kind Regards,

Rusha

Penghai.Z.480

Thank you Rusha. I have submitted a technical support ticket.

d2l.d.8300

May I know what the cause of the problem is? i also in the face of this error

Bob.R.3922

I would like to know the cause of this issue too. I am a D2L partner and cannot find this information.

Stefanie.B.518

Hello

@d2l.d.8300 and @bob@you-attend.com
I believe the resolution to this type of issue will require further investigation with a Support Team member to review the permissions and unique configuration of your Brightspace Implementation.

If you need assistance connecting to your help desk to create the support case, please reply back and we can help to connect you.