I know, I'm a little late, so I hope you solved somehow.
In case you didn't, first of all I see you are using "eventTicketStrip", which is not a valid type of pass. You should use "eventTicket" and then use the strip.png asset (+ @2x @3x) to let Wallet know the layout you want to be rendered.
Second, omitting icon@\3x.png on most recent iPhones, make a pass invalid, but it is perfect valid on Macs and older iPhones (I don't remember the last iPhone that used up to @2x). The website kind of lies. I mean, it is right, but it doesn't consider the device.
Third, always check for logs, if you have a Mac, through the Console.app in Application/Utilities, by connecting you phone via USB or network, giving the authorization as it should pop on your iPhone and then by filtering the logs (there will be a lot).
If you are opening the pkpass from another application, just filter by "Passkit".
If you are opening the pkpass via network or whatever, filtering by the process "passd" is fine.
Filtering by process means writing "passd" in the search box, pressing enter and then selecting the kind of parameter near "passd".
Hope this helps.
Alexander