iOS app lacks App ID Prefix. UniversalLinks is not enabled for the app. Where to enter the App ID?

Question

I get the Firebase Dynamic Link error

iOS app lacks App ID Prefix. UniversalLinks is not enabled for the app.

The weird thing is, that I have 3 ids

1. Bundle ID (8NF32DY4EL.app.myapp.ios)
2. Team ID (EASLU367HG)
3. App prefix (Q6AUGEP5N5)

When I go to the Firebase settings, it only offers me to add a Team ID. The field for the bundle ID is grayed out. I can't find a place to add the App prefix.

That's how the Apple App Site Association File looks like

{
"applinks": {
    "apps": [],
    "details": [{
        "appID": "EASLU367HG.8NF32DY4EL.app.myapp.ios",
        "paths": [
            "NOT /_/*",
            "/*"
        ]
    }]
}

The appID field in the json is [TEAMID][BUNDLEID]. There is no App prefix. The 8NF32DY4EL is part of the Bundle ID (I know it's weird).

Where can I set the App prefix in Firebase?

Here are the 3 Apple IDs from https://developer.apple.com/account/resources/identifiers/bundleId/edit

Here are the Firebase settings from https://console.firebase.google.com/u/0/project

Here are the dynamic link errors

Answer 1

I also got this warning when creating a firebase dynamic link.

For my case, I realized the auto generated Bundle ID under Google Cloud Console > API & Services > Credentials > OAuth 2.0 Client IDs > iOS client is wrong (eg: lack of one 'e'). The warning no longer exist after I corrected this.