I’ve hit this same issue, but with Norton. In fact, if you use their test tool you can see that thy’re blocking fileusr.com because other sites use bit coin mining javascripts on it.
I just got off the phone with Wix support, and they wouldn’t own up to fileusr.com being how iFrame data is hosted. I got so frustrated, I ended the call without resolution, and decided to host the page myself, and use an embedded web page object, but that just throws a console error.
So frustrating. We are an older dog rescue, and it’s our adoption and volunteer pages that don’t work as a result of this.