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LTI 2.0 Certification: can not retrieve tool consumer profile on step 1.2

LTI 2.0 Certification: can not retrieve tool consumer profile on step 1.2

Hi All !

I have met a problem during passing LTI 2.0 certification here https://www.imsglobal.org/lti/cert/index.php

On step 1.2 Perform an accepted registration request I need Tool Provider to retrieve tool consumer profile, but get 400 response when use URL provided by certification tool. Please check details on attached screenshots

I follow section 6.1.2 Fetch Tool Consumer Profile of Implementation Guide.

The Tool Provider retrieves the Tool Consumer Profile by issuing an HTTP GET request to the URL specified by the tc_profile_url parameter. The Tool Provider specifies the version of LTI that it intends to use for the integration contract by adding an lti_version query parameter to the URL. For example, suppose the Tool Consumer Profile URL is declared as

tc_profile_url = http://coyote.example.biz/lti/ToolConsumerProfile/72942860da8611e0957208...

Then, to establish a contract based on LTI version 2.0, the Tool Provider would issue a GET request to the URL

http://coyote.example.biz/lti/ToolConsumerProfile/72942860da8611e0957208...

The Tool Provider examines the Tool Consumer Profile and confirms that the capabilities and services offered by the Tool Consumer are compatible with the needs of the Tool.

Can you please help me to understand where is my error ?

Thank you