There are a number of reasons this type of error may be reported. Generally I see that INVALID_ARGUMENT is returned when client specified an invalid argument in the call[1][2][3]. So, what may be happening depends on your setup and your use-case.
[1] https://cloud.google.com/apis/design/errors#handling_errors [2] https://cloud.google.com/apis/design/errors#generating_errors [3] https://cloud.google.com/service-infrastructure/docs/service-control/getting-started#test -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-appengine+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/25a895f5-d4f6-4990-99c5-0ae18799fedfo%40googlegroups.com.
