We have the same issue. It was working well with iOS 18, but with iOS 26 we get the error This operation couldn't be completed (ASDErrorDomain- Error 507.) . The appclip works when run via the TestFlight, but not when open via an URL. So it seems the error is at the appClip invocation. Any help to fix the issue is appreciated.

We have the same issue. The appclip was working well before, but with iOS 26 we get the error This operation couldn't be completed. (ASDErrorDomain error 507.) . The appclip works when run via the TestFlight, but not when open via an URL. So it seems the error is at the appClip invocation. Any help to fix the issue is appreciated.

I have also opened a feedback and the number is FB20453270

I have a small update, when upgraded to Xcode 26 (instead of Xcode 16), the appclip did not build right away. The reason was Apple has changed how we need to create the .entitlements files. So I had to do the following: <key>com.apple.developer.parent-application-identifiers</key> <array> - <string>$(PARENT_APP_IDENTIFIER)</string> + <string>$(AppIdentifierPrefix)com.mydomain.parentID</string> </array> i.e add AppIdentifierPrefix + parentID instead of PARENT_APP_IDENTIFIER With this fix, the appClip got build with Xcode 26. My issue with appClip invocation is not yet fully fixed, but hope this will help someone. Let me know if someone found a better solution. Note: I have seen it works in some phones with iOS 26 (like iPhone 14) when I use the appClip code (circular code), but not with plain QR code, and that too not on all phones (still not works on 14 pro max). But once it works on a given phone, it worked on normal QR code too (weird, I know). My best guess is that it' a cache issue.

Did anyone found a solution? I have a small update, when upgraded to Xcode 26 (instead of Xcode 16), the appclip did not build right away. The reason was Apple has changed how we need to create the .entitlements files. So I had to do the following: <key>com.apple.developer.parent-application-identifiers</key> <array> - <string>$(PARENT_APP_IDENTIFIER)</string> + <string>$(AppIdentifierPrefix)com.mydomain.parentID</string> </array> i.e add AppIdentifierPrefix + parentID instead of PARENT_APP_IDENTIFIER With this fix, the appClip got build with Xcode 26. My issue with appClip invocation is not yet fully fixed (though now it works on some cases), but hope this will give someone a starting point. Let me know if anyone found a proper solution. I have also opened a feedback and the number is FB20453270

Also, I learnt that apple-app-site-association (AASA) file structure has also changed. { "applinks": { "details": [ { "appIDs": ["MYTEAMID.com.example.myApp"], "components": [ { "/": "/*" } ] } ] }, "appclips": { "apps": [ "MYTEAMID.com.example.myApp.Clip" ] } } i.e with respect to my previous AASA file, I had to do the following: instead of paths we need to add components as above. in the applinks we should add the main app bundle id (not the clip's bundle id) removed "apps": [], from the applinks section. Hope this will help someone.

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Also, I learnt that apple-app-site-association (AASA) file structure has also changed. { "applinks": { "details": [ { "appIDs": ["MYTEAMID.com.example.myApp"], "components": [ { "/": "/*" } ] } ] }, "appclips": { "apps": [ "MYTEAMID.com.example.myApp.Clip" ] } } i.e with respect to my previous AASA file, I had to do the following: instead of paths we need to add components as above. in the applinks we should add the main app bundle id (not the clip's bundle id) removed "apps": [], from the applinks section. Hope this will help someone.

@AxM1983 that's great to hear. After the above fixes, mine is working in some iOS 26, but not in all the phones. And it was public unlisted app from the beginning. If you don't mind, can you share your AASA file, just as a reference. Thank you.