RegistrationError(rawValue: 1) on Ray-Ban Meta Gen 1 — startRegistration fails after portal setup

[Hrsha]

Hey team,

I've been trying to get startRegistration() working for the past few days and keep hitting RegistrationError(rawValue: 1). Running SDK v0.5.0 on Ray-Ban Meta Gen 1 glasses with an iPhone on iOS 26.2.

My setup: I've got Developer Mode enabled, created a project on the Wearables Developer Center, added iOS app details (Team ID, Bundle ID, URL scheme), set up camera permissions, created a distribution version and assigned it to a release channel.

The weird thing is — when I call startRegistration(), it doesn't even open the Meta AI app. It just throws immediately. registrationState is stuck at rawValue 1 and devices always returns empty.

I've tried both MetaAppID "0" and my real App ID. Tried unregistering first, re-initializing the SDK, toggling Developer Mode, updating everything. Nothing changes.

Meta AI app itself works fine with the glasses — I can take photos, play music, everything. Just the DAT registration won't go through.

A few questions:

What does rawValue 1 actually mean for RegistrationError in v0.5.0?
Any known quirks with Gen 1 glasses and DAT?
Am I missing a portal step? I've done version creation + release channel assignment.
Any pointers would be really helpful. Thanks!

[Hrsha]

Update: Solved it.

The issue was that I was using a custom URL scheme (myappscheme) as the AppLinkURLScheme in Info.plist and on the Meta Wearables Developer Center. Switching to a proper Universal Link with HTTPS got the registration flow working.

Here's what fixed it:

1. Info.plist — changed AppLinkURLScheme from a custom scheme to a Universal Link URL, and added the TeamID key inside the MWDAT dictionary:

MWDAT

AppLinkURLScheme
https://your-domain.com/auth
MetaAppID
YOUR_APP_ID
ClientToken
AR|YOUR_APP_ID|YOUR_TOKEN
TeamID
$(DEVELOPMENT_TEAM)

2. Wearables Developer Center — updated the iOS app configuration so the Universal link field matches https://your-domain.com/auth. Then created a new version and assigned it to a release channel with my Meta account added as a test user.

3. Apple App Site Association file — hosted at https://your-domain.com/.well-known/apple-app-site-association with the proper appID and paths:

{
"applinks": {
"apps": [],
"details": [
{
"appID": "TEAMID.com.your.bundleid",
"paths": ["/auth/*", "/auth"]
}
]
}
}
4. Entitlements — added Associated Domains capability with applinks:your-domain.com.

After force-quitting Meta AI and the app, the pairing flow now works end-to-end. The "Connect to your Meta devices" approval screen appears in Meta AI as expected.

Hope this helps anyone hitting the same RegistrationError(rawValue: 1) issue. Credit to the OpenGlasses project (@straff2002) — looking at their setup pointed me to the Universal Link approach.