Add custom claim to access token not working

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I am also in the same boat. I have tried everything but can’t get simple thing in the access token.
(I am using React SPA)
My Rule looks like:

function addEmailToAccessToken(user, context, callback) {
  // This rule adds the authenticated user's email address to the access token.

  var namespace = 'https://dev-xxx.us.auth0.com/';
	console.log("I am here", "at: ", context.accessToken, "it: ", context.idToken);
  if (context.accessToken) {
  	context.accessToken[namespace + 'email'] = user.email;
}
  
 	if (context.idToken) {
  	context.idToken[namespace + 'email'] = user.email;
}
  return callback(null, user, context);
}

I can see the rule is fired only when when user logs in (not every time when I call getAccessTokenSilently)
But also when it gets called, the context.accessToken and context.idToken are empty.

 I am here at: {} it: {}

I have also tried using pre made template and even tried Action/Flows Can’t seem to get custom claims/attributes in access token.

Can anyone from Auth0 please help?