Why am I seeing invalid_request: The client with id: "XXXX" (oauth) was not found

I’m somewhat new to Auth0 and I’ve gone through the steps to set up APIs and clients of all forms. When I try to execute the Authorization Code flow the authorize endpoint returns an error.

I can execute the password grant flow for that same client and API, once I set the default connection for Username-Password-Athentication

Here is my request:

What am I missing?

The authorization endpoint for your service as mentioned in the documentation is available at https://{your_domain}{.region_if_not_default}.auth0.com/authorize and not at /oauth/authorize so you should update the endpoint you’re using accordingly.

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