I have one Youtube multibox and four iFrame/HTML multibox's on this client's website [
www.TomDunnCPA.com] and the Youtube mutlibox works flawlessly as you can see in the first photo...
The first iFrame/HTML multibox (LinkedIn icon at the bottom right) also works... However, the three remaining iFrame/HTML multibox's do not work properly (Twitter, Facebook & Youtube)... Just do NOT work & open in a new tab/window instead of the Multibox Popop.
I'm at a loss, the code appears to me to be correct.
YouTube Multibox Popop workingLinkedIn Multibox Popop working but not Twitter, Facebook, Youtube