Pkpass won't open on iOS from email application

Question

All websites mention that Passbook passes can be emailed. But when the pass (generated by our server) is attached to the email, the iOS email client will not open it and write "(null)". The same pass works fine on Android, and it has no problems communicating with our web service. Any ideas? Google searches did not offer any solutions.

Screenshot:

Answer 1

Solved: there were several problems:

• The authentication token must be at least 16 characters long
• " Apple Inc." () "AppleWWDRCA" ()
• - https

Answer 2

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iPhone Simulator Console, .