This issue is now fixed. Here is a summary of the cause: The PageSpeed service was switched off on 3rd August. However, the App Engine deployment API continued to have a call for it. A couple of days ago, a new App Engine minor version was released to production, in which this call returns a HTTP 404 and the warning message above. Unfortunately, this App Engine change was released to production before the corresponding change in the App Engine SDK, which is still calling the decommissioned API endpoint. The error message you have received was harmless, the SDK still completed the app deployment.
The SDK team is working on preventative action items that will avoid asynchronous releases. -- 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/7bcbf9ca-0ee5-4473-99fc-898646c931b3%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
