You passed an empty string for 'client_reference_id'. We assume empty values are an attempt to unset a parameter; however 'client_reference_id' cannot be unset. You should remove 'client_reference_id' from your request or supply a non-empty value.<script src="https://js.stripe.com/v3/"></script>
<script>
var stripe = Stripe('pk_live_51KD8laDVZcDPTvQqwvvCTZWSKorlC11EwktKveUFlzqnjDpNvxQxEtrNqeQMMfB6NJOIEUQcLvBKjgygKCp2yzT40017u2zvWn');
stripe.redirectToCheckout({
  sessionId: ''
}).then(function (result) {
	console.log(result.error.message);
});
</script>