Flutter No Network Security Config specified, using platform default and Ignoring header X-Firebase-Locale because its value was null. Error

Question

I'm trying to run and register with Firebase Auth. It doesn't log in, and it gives the console an error like this:

D/NetworkSecurityConfig( 1293): No Network Security Config specified, using platform default
W/System  ( 1293): Ignoring header X-Firebase-Locale because its value was null.

Login codes:

await FirebaseAuth.instance.signInWithEmailAndPassword(
  email: _loginEmail.text,
  password: _loginPassword.text,
);

Thanks in advance for the help.