Microsoft Forms embed in a modal dialog not working

I'm trying to embed a Microsoft forms survey via bootstrap modal dialog. When the page is loaded, instead of the actual survey, the below is loaded. When "Fill out the form" is clicked, another browser window is opened with the survey. I would like to have the survey loaded inside the iframe I've included in the modal dialog. 

Note: I'm using the latest Microsoft Edge browser and tried several different embed sizes up to 1200 pixels.