The Ed (or AB's techies) will almost certainly need to know which web browser you're using (Internet Explorer, Edge, Chrome, Firefox, Vivaldi, Opera, Safari, etc) and on what type of device. (A Windows PC? An Android phone? An Apple Mac? An iOS device?).
I don't get the problem using Firefox or Vivaldi on a Windows 7 PC, nor on an Android phone using Chrome. Such problems tend to affect only certain device/browser combinations. (AB seems particularly prone to throwing a wobbly when viewed using Safari on an iPad, for example).