Issue with iFrame on this theme

I have used a standard piece of code which i have used before with no issues but on the this theme I keep getting a “opps that page can’t be found”

the code is

<iframe
src=”https://digitalewe.com/FionnCondren/enter/“
frameborder=”0″
width=”100%”
height=”100%”
scrolling=“yes”>
</iframe>

the url is correct when used directly but when using https://www.fionncondren.com i get the opps message, any ideas?