Unable to find an algorithm for key

[Julio-Cardenas]

I´m using the Oauth 2.0 flow process with Python SDK, in the step 12 using the get_bearer_token function i get the error shown in the image. I make the peticion in a instance made in node JS and the redirect URl is located in a lambda function made in python. All the credentials are the same (sandbox). Following the steps this error appears and i verified all the steps and anythings works. I update the python-jose library used by intuit but nothing has worked. Anyone has seen this error? Any hint /advice.