I use recaptcha in localhost and all works, if I add my domain it does not work.

I implemented hundred times for other websites but on the domain rs-umzüge.de its not working. Key not detected. Maybe because the domain has umlauts ?

enter image description here

        grecaptcha.ready(async function() {
          grecaptcha.execute('6Le_YwAqAAAAADHpce0fDHhWywPYnAB3MMdpK4Oy', {action: 'submit'}).then(async function(token) {

and

    <script src="https://www.google.com/recaptcha/api.js?render=6Le_YwAqAAAAADHpce0fDHhWywPYnAB3MMdpK4Oy"></script>

what I am doing wrong?