Some GCM push notifications certificates where expired. I have renew the certificates i iOS but notifications doesn't arrive. Then I have gone to the web https://developers.google.com/mobile/add?refresh=1 to configure again de certificates. When I choose the project, iOS platform, then the page to add p12 certificates files. The web shows an error in the upload section and it seems it doesn't work well.
How could renew the gym certificates for iOS platform?