Exclude div from Iframe

Question

I have a website that I host but the server belongs to 000webhost. at the bottom there is a div element with a class of disclaimer that has a short sentence regarding the war in Ukraine. I didnt mind it until I tried making my site a extension via Iframe and found out that the "disclaimer" takes up the majority of the space. I tried using W3 school's template to remove it but it hasnt worked. here is my code:

<iframe id="myFrame" src="https://mytinyserver.000webhostapp.com/" ></iframe>


<button onclick="myFunction()">Try it</button>

<script>
function myFunction() {
  var iframe = document.getElementById("myFrame");
  var elmnt = iframe.contentWindow.document.getElementsByClassName("disclaimer")[0];
  elmnt.style.display = "none";
}
</script>