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Integrate Canvas with IMathAS using a developer key.

MartinTony

I am struggling to integrate Canvas with IMathAS using a developer key.

When I access the assignment imported from IMathAS in Canvas, I encounter 2 types of errors.

Invalid token error

request type: GET
request URL: https://canvas.instructure.com/post_message_forwarding?rev=59677caad5-09bb3c9388a5ba3a&token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzUxMiJ9.eyJwYXJlbnRfZG9tYWluIjoibG1zLnJhdGlvbmFscmVhc29uaW5nLm5ldCJ9.HkrPssJkLlXQPtORZ8hdovfA2g5HdD7T-bA4uEdho55wAfKIgnRhUEBi5UxJrbnuwQEW50q9ELfrpxtZw6h1KA
response code: 403 Forbidden
response message: Invalid token

Invalid lti_message_hint

request type: GET
request URL: https://sso.canvaslms.com/api/lti/authorize_redirect?scope=openid&response_type=id_token&response_mode=form_post&prompt=none&client_id=10000000000024&redirect_uri=https%3A%2F%2Fimathnew.rationalreasoning.net%2Flti%2Flaunch.php&state=state-664bf741e38c09_80019289&nonce=nonce-664bf741e38e08.75797103&login_hint=5576d223a777670d32bac2e720da67f2b881fb88&lti_message_hint=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJ2ZXJpZmllciI6IjhmMGRmZDJlODVkNzhhN2ExZmNkMjBjYmJiYzhmZGFkYTA3NzMzNmY3MWIwM2NlMmM4YTg0N2JhODhlZGE2NWZjYzIzZTdiN2Y5ZDQ1OWQyNDQ4NzhiYzM3NjgxZDZiODM3MGYwNzcwOWE0NmVlMTM5MzMzNzFhYzZkYmZmZDM4IiwiY2FudmFzX2RvbWFpbiI6Imxtcy5yYXRpb25hbHJlYXNvbmluZy5uZXQiLCJjb250ZXh0X3R5cGUiOiJDb3Vyc2UiLCJjb250ZXh0X2lkIjoxMDAwMDAwMDAwMDAxNywiY2FudmFzX2xvY2FsZSI6ImVuIiwiaW5jbHVkZV9zdG9yYWdlX3RhcmdldCI6dHJ1ZSwiZXhwIjoxNzE2MjU0ODI3fQ.W1rc07U8S4DWI5D0vkqcKUTiqMY58GZ-QnehpUHEybk
response code: 400 Bad Request
response message: {status: "bad_request", message: "Invalid lti_message_hint"}

I've correctly set the Developer Key(LTI key) and the Client ID according to the instructions.

Can you instruct me how to solve these issues?

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