App Attest Error

[robijan6]

Hi,
I'm running into an issue with App Attest in my iOS app, and I'm hoping you can help me troubleshoot.
I've registered my app in App Check for both App Attest and Device Check, and I've double-checked that my bundle ID is correct. I've also enabled App Attest in Xcode capabilities and am testing on a physical device.
However, when I run the app, I'm getting the following error in the console:
Error getting App Check token; using placeholder token instead. Error: App attestation failed. HTTP status code: 403 "message": "App attestation failed." 'm using firestore.
I've tried a few things, but I'm still stuck. Any suggestions on what might be causing this or how to resolve it would be greatly appreciated!
Thanks in advance