Sign in with Apple suddenly fails with Error 7003

Hello, our Sign in with Apple Button no longer works and throws an 7003 error. It worked a few days ago but suddenly fails.

Any ideas how to fix this? Thanks in advance!

plist:

<dict>
	<key>com.apple.developer.applesignin</key>
	<array>
		<string>Default</string>
	</array>
...

Code:

  var body: some View {
    VStack {
      SignInWithAppleButton(.signUp) { request in
        request.requestedScopes = [.fullName, .email]
      } onCompletion: { result in
        switch result {
        case .success(let authResults):
          handleSuccess(authorization: authResults)
        case .failure(let error):
          self.credentialFailure = true
          self.errorMessage = .appleSignInError
          logger.error("SIWA login failure: \(error)")
        }
      }
      .signInWithAppleButtonStyle(.white)
      .cornerRadius(GlobalValues.cornerRadius)
    }
  }

Error:

Authorization failed: Error Domain=AKAuthenticationError Code=-7003 "(null)" UserInfo={AKClientBundleID=com.our.app}
ASAuthorizationController credential request failed with error: Error Domain=com.apple.AuthenticationServices.AuthorizationError Code=1001 "(null)"
SIWA login failure: Error Domain=com.apple.AuthenticationServices.AuthorizationError Code=1001 "(null)"