Embedding Code from Dataset in dynamiv page leads to 404

Hi everyone!

I am trying to achieve to get the code to embed an iFrame on my dynamic page from the dataset. This is what I did so far:

$w.onReady( () => {
$w(‘#dataSetBites’).onReady( () => {
let item = $w(‘#dataSetBites’).getCurrentItem();
console.log(item)
let newHtml = item.html;
console.log(newHtml)
$w(‘#htmlAnmeldung’).src = newHtml;
console.log($w(‘#htmlAnmeldung’).src)
});
});

The output looks good. Unfortunately my iFrame shows a 404 error when running the page (same thing on the live page).

On the live page the error in the developer console shows this error:
Refused to execute script because its MIME type (‘application/jsonp’) is not executable, and strict MIME type checking is enabled.

Any tips how I can fix this?

Thank you!

How do look like your → html-field ← inside your database ?
What kind of type is it ?