Airplay + Fairplay not working on iOS/macOS 26.1

[multiplexer2]

Have you read the FAQ and checked for duplicate open issues?
Yes

If the problem is related to FairPlay, have you read the tutorial?

Yes

What version of Shaka Player are you using?

4.16.11

Can you reproduce the issue with our latest release version?
Yes

Can you reproduce the issue with the latest code from main?
Yes

Are you using the demo app or your own custom app?
Both

If custom app, can you reproduce the issue using our demo app?
Yes

What browser and OS are you using?
Safari on iOS/macOS 26.1

For embedded devices (smart TVs, etc.), what model and firmware version are you using?
N/A

What are the manifest and license server URIs?

The problem can be reproduced with Fairplay videos on the Shaka demo page.

What configuration are you using? What is the output of player.getNonDefaultConfiguration()?

The problem can be reproduced with Fairplay videos on the Shaka demo page.

What did you do?

• Navigate to the Shaka demo page and filter for Fairplay DRM content.
• Play a video. e.g. Tears of Steel (HLS AVC - FairPlay - SingleKey)
• The video should start playing without issues
• Start Airplay against an Apple TV or other Airplay-device

What did you expect to happen?
The video to play nicely with Airplay

What actually happened?

• The Airplay playback never starts, and the following error message is displayed on the page:

Shaka Error DRM.FAILED_TO_GENERATE_LICENSE_REQUEST (The operation is not supported.,NotSupportedError: The operation is not supported.,)

• Error message in console:

category: 6
code: 6006
data: ["The operation is not supported.", NotSupportedError: The operation is not supported., undefined] (3)
handled: false
message: "Shaka Error DRM.FAILED_TO_GENERATE_LICENSE_REQUEST (The operation is not supported.,NotSupportedError: The operation is not supported.,)"
severity: 2
stack: "@https://shaka-player-demo.appspot.com/lib/util/error.js:101:24↵@https://shaka-player-demo.appspot.com/lib/drm/drm_engine.js:1335:41"

Are you planning to send a PR to fix it?

No

[multiplexer2]

It seems like this only happens when using the modern EME, not when using legacy Apple Media Keys.

[avelad]

@robwalch, Do you know of any internal errors related to this?

[avelad]

I reproduced it, so the error is in Safari 26.1 itself; it's not something we can fix in Shaka. Sorry!

[avelad]

Same issue on iOS 26.2

[avelad]

@jyavenard Do you know if this is a known issue in Safari?

Note: It seems like this only happens when using the modern EME, not when using legacy Apple Media Keys.