This issue is occurring for me implementing Google Sign in for Web on App Engine:
https://code.google.com/p/googleappengine/issues/detail?id=12516 Google Sign In is incompatible with Google Cloud Platform. Please escalate. -- 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 [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/d96b7370-5bb9-429a-b740-7f9afeff13dd%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
