iOS: invalid certificates error for push notifications

This error means that the certificates uploaded for your iOS app in Settings > App & Sites are invalid. These can be invalid for a number of reasons:

• You could be using the incorrect type of file/cert
• You may have uploaded a cert for a different app
• A development cert could be in the place of the enterprise cert or vice a versa
• The certificates could be out of date

If you encounter such an error read the iOS push notifications page and double check you have uploaded the correct certificates.