Firebase – Firestore Permission Denied With No Rule Change

I have been experiencing sudden permission denied errors on Firestone document reads from a Flutter app. The app has been running for a while and had no issues beforehand. No code changes or rule changes have been made, but today all document reads are being rejected when the rules should allow the read with no problem. I have tried setting the rules to public to no luck. Here is the rules that I currently have:

rules_version = '2';

service cloud.firestore {
  match /databases/{database}/documents {
    match /appConfig/{document=**} {
      allow read;
      allow write: if false;
    }

    match /users/{document=**} {
      allow read;
      allow write: if request.auth != null;
    }

    match /workspaces/{workspace} {
      allow read,create;
      allow write: if request.auth != null;
    }
    
    match /workspaces/{workspace}/{document=**} {
        allow create;
      allow read, write: if request.auth != null;
    }
  }
}

I am trying to read a document under the users collection as well as the appConfig collection.