Hello Richard, This is a known issue, and Developers are working towards a fix. You can refer to the same issue in the public tracker <https://issuetracker.google.com/35901176>; further progress will get reflected in that thread, where a temporary workaround is proposed:
"As a temporary workaround, you can replace the expired urlfetch_cacerts.txt with https://curl.haxx.se/ca/cacert.pem On linux you can use the following command: wget https://curl.haxx.se/ca/cacert.pem -O {Root of Python SDK}/lib/cacerts/urlfetch_cacerts.txt ". -- 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 post to this group, send email to google-appengine@googlegroups.com. 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/37a14ab3-41e4-4cb7-a7d2-2e1073abeee2%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
