Still encountering this in 2024. Have you ever found a solution?

Hi Argun, appreciate your response. May I ask what exactly do I need to check in the app's Build Settings and Build Phases? In Build Phases, I do have the Embed Foundation Extensions which is at the very bottom of that list. Does it need to be before a specific build phase? More details on Embed Foundation Extensions: Destination: PlugIns and Foundation Extensions Copy only when installing: false Code Sign On Co...: No value

Also, can you please share how to check the build logs? A documentation would suffice. Thank you. I suspect the problem is as you said: "the build is not correctly including the extension". I am just mocking the push payload from Apple's CloudKit tool for it. I used the same payload that I used while testing from an Xcode-run build. As mentioned, the Xcode-run build worked, so highly assume the problem is with embedding.