For iOS17 we've had no problem playing Apple Fairplay encrypted content with keys delivered from our key server running on FairPlay Streaming Server SDK 5.1 and subsequently FairPlay Streaming Server SDK 26. It's built and deployed using Xcode Version 26.1.1 (17B100) with no changes to the code and - as expected - the content continued to be successfully decrypted and played (so far so good). However, as soon as a device was updated to iOS26, that device would no longer play the encrypted content. Devices remaining on iOS17 continue to work normally and the debugging logs are a sanity-check that proves that. Is anyone else experiencing this issue? Here's the code (you should be able to drop it into a fresh iOS Xcode project and provide a server url, content url and certificate).

For devices that are still on ios17, playing Fairplay encrypted content still works fine. For devices that I've upgraded to ios26 playing the same content in the same app no longer works. I can advance and see the stream frames by tapping +10 scrubbing so I know that the content is being decrypted but tapping the play button of AVPlayer for an AVPlayerItem now does nothing in ios26. Is this a breaking change or is there a stricter requirement that I now have to implement?

We're sending the spcData payload to our fairplay key server (version 5.1) with the base64 encoded string of our fairPlay.cer that was downloaded from our developer portal and we're getting a spcVersionErr (-42580) for the spc version. The value that is being received by the key server seems to be 813827283 when it should be either 1 (base_constants.SPCVersion.v1.rawValue) or 2 (base_constant.SPCVersion.v2.rawValue). We're assuming we're encoding the fairplay.cer incorrectly. Any insight from anybody would be appreciated.