code: def _raise_unrecoverable_error_payplug(self, exception):
          
          message = ('There was an unrecoverable error during the HTTP request. It seems to come from our servers. '
                     'If you are behind a proxy, ensure that it is configured correctly. If the issue persists, do not '
                     'hesitate to contact us with the following information: `' + repr(exception) + '`.')
          raise exceptions.ClientError(message, client_exception=exception)
docs: Raises an exceptions.ClientError with a message telling that the error probably comes from PayPlug.
          :param exception: Exception that caused the ClientError.
          :type exception: Exception
          :raise exceptions.ClientError