code: def errors():
      
      from oauthlib.oauth2.rfc6749.errors import raise_from_error
      try:
          error = None
          raise_from_error(request.values.get('error'), params=dict())
      except OAuth2Error as raised:
          error = raised
      return render_template('invenio_oauth2server/errors.html', error=error)
docs: Error view in case of invalid oauth requests.