Emails open in OWA Light, but not OWA Full

So, this is an odd problem I'm hoping someone has seen before. I'm trying to troubleshoot a machine (this only happens on one PC) because when a user (and it doesn't matter which user) logs into OWA Full (tried with IE 11 and Chrome) they can see all of their emails, but cannot click on them or open them. If the user logs into OWA Light (IE 11 and Chrome) they can open emails and function normally.  Everything works fine in both browsers (again, IE 11 and Chrome) on all other PCs.

Any thoughts on this?  If this is the wrong forum I apologize, I'm not 100% certain which version of Exchange they are running as I am a contractor that only maintains a few specific PC's and servers.