Unauthorized_client OAuth2


I am getting an unauthorized_client error when using Authorization Code Grant Type for OAuth2.

The initial redirect:

                <a href="https://sketchfab.com/oauth2/authorize/?response_type=code&client_id=[MY_CLIENT_ID]&redirect_uri=[MY_REDIRECT_URI]" class="btn btn-primary btn-float">Connect SketchFab</a>

On the first attempt - It successfully goes to the login screen - I login, it successfully redirects to the Redirect_URI, but with a error request string stating unauthorized_client.

Am I doing something wrong here?

The ticket here:

Referenced that it’s typically a syntax error - which i can confirm is not.

The request hasn’t been successful as the Connected Apps doesn’t list my Application.

Any assistance here would be great.

Thanks in advance!

(Post moved to #development-and-api )

I’ll ask our developer for help with this.