After installing the Apple Pay for iOS profile, the log messages from Console are more detailed: error 13:38:31.786791+0000 PassbookUIService Codable: Failed to decode Merchant Session Created: Swift.DecodingError.typeMismatch(Swift.UInt, Swift.DecodingError.Context(codingPath: [CodingKeys(stringValue: "messageBody", intValue: nil), CodingKeys(stringValue: "updateBody", intValue: nil), CodingKeys(stringValue: "merchantSession", intValue: nil), CodingKeys(stringValue: "epochTimestamp", intValue: nil)], debugDescription: "Expected to decode UInt but found a string instead.", underlyingError: nil)) error 13:38:31.786824+0000 PassbookUIService Session 11150: Fatal Error: Failed to decode merchant session created I've submitted FB16392549.

I'm experiencing the same problem in Firefox 134.0 (aarch64) on macOS 14.6.1 (Apple M1). Console 1.1, shows these messages when connected to my iPhone 14 running iOS 18.1.1: error 14:43:31.069080+0000 PassbookUIService Codable: Failed to decode Merchant Session Created: Error Domain=NSCocoaErrorDomain Code=4864 UserInfo={NSCodingPath=<private>, NSDebugDescription=<private>} error 14:43:31.069103+0000 PassbookUIService Session 12311: Fatal Error: Failed to decode merchant session created