How to fix this error when setting auth0?

Question

OAuth

Traceback (most recent call last):
  File "C:\Users\psalt\AppData\Local\Programs\Python\Python36-32\lib\site-packages\flask\app.py", line 1997, in __call__
    return self.wsgi_app(environ, start_response)
  File "C:\Users\psalt\AppData\Local\Programs\Python\Python36-32\lib\site-packages\flask\app.py", line 1985, in wsgi_app
    response = self.handle_exception(e)
  File "C:\Users\psalt\AppData\Local\Programs\Python\Python36-32\lib\site-packages\flask\app.py", line 1540, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "C:\Users\psalt\AppData\Local\Programs\Python\Python36-32\lib\site-packages\flask\_compat.py", line 33, in reraise
    raise value
  File "C:\Users\psalt\AppData\Local\Programs\Python\Python36-32\lib\site-packages\flask\app.py", line 1982, in wsgi_app
    response = self.full_dispatch_request()
  File "C:\Users\psalt\AppData\Local\Programs\Python\Python36-32\lib\site-packages\flask\app.py", line 1614, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "C:\Users\psalt\AppData\Local\Programs\Python\Python36-32\lib\site-packages\flask\app.py", line 1517, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "C:\Users\psalt\AppData\Local\Programs\Python\Python36-32\lib\site-packages\flask\_compat.py", line 33, in reraise
    raise value
  File "C:\Users\psalt\AppData\Local\Programs\Python\Python36-32\lib\site-packages\flask\app.py", line 1612, in full_dispatch_request
    rv = self.dispatch_request()
  File "C:\Users\psalt\AppData\Local\Programs\Python\Python36-32\lib\site-packages\flask\app.py", line 1598, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "C:\Users\psalt\PycharmProjects\ezd\app\views.py", line 37, in callback_handling
    issuer="https://" + 'ksg.eu.auth0.com' + "/")
  File "C:\Users\psalt\AppData\Local\Programs\Python\Python36-32\lib\site-packages\jwt\api_jwt.py", line 78, in decode
    jwt, key=key, algorithms=algorithms, options=options, **kwargs
  File "C:\Users\psalt\AppData\Local\Programs\Python\Python36-32\lib\site-packages\jwt\api_jws.py", line 140, in decode
    key, algorithms)
  File "C:\Users\psalt\AppData\Local\Programs\Python\Python36-32\lib\site-packages\jwt\api_jws.py", line 204, in _verify_signature
    key = alg_obj.prepare_key(key)
  File "C:\Users\psalt\AppData\Local\Programs\Python\Python36-32\lib\site-packages\jwt\algorithms.py", line 207, in prepare_key
    key = load_pem_public_key(key, backend=default_backend())
  File "C:\Users\psalt\AppData\Local\Programs\Python\Python36-32\lib\site-packages\cryptography\hazmat\primitives\serialization.py", line 24, in load_pem_public_key
    return backend.load_pem_public_key(data)
  File "C:\Users\psalt\AppData\Local\Programs\Python\Python36-32\lib\site-packages\cryptography\hazmat\backends\multibackend.py", line 314, in load_pem_public_key
    return b.load_pem_public_key(data)
  File "C:\Users\psalt\AppData\Local\Programs\Python\Python36-32\lib\site-packages\cryptography\hazmat\backends\openssl\backend.py", line 1110, in load_pem_public_key
    self._handle_key_loading_error()
  File "C:\Users\psalt\AppData\Local\Programs\Python\Python36-32\lib\site-packages\cryptography\hazmat\backends\openssl\backend.py", line 1325, in _handle_key_loading_error
    raise ValueError("Could not unserialize key data.")
ValueError: Could not unserialize key data.

Answer 1

To be honest, it's hard to tell what happened from this error.
I can recommend checking the keys and in general whether they are loaded. Then, if possible, try to decrypt this token on the official jwt website, there is an opportunity there. If everything is OK - the problem is in the configuration, no matter how trite it may sound.