I am still getting this today... OS X 10.10.5, Safari 9.0.3 (10601.4.4). Console has some warnings
*Unexpected CSS token: :* And lots of errors like *Unrecognized Content-Security-Policy directive 'base-uri'.* *The source list for Content Security Policy directive 'script-src' contains an invalid source: ''strict-dynamic''. It will be ignored.* *The source list for Content Security Policy directive 'script-src' contains an invalid source: ''nonce-<token here>'. It will be ignored.* -- 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/29d0420f-b4d3-4ddb-bb51-3aa953a7e904%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
