Selecting / searching Products in back office doesn't work

[jackbeanoffendsyou]

Hello

I'm really stuck on this annoying issue. 

When I try to create a discount in the back office, I cannot search or select any products. I can click on the area to search and it goes yellow, but nothing happens and it is almost like it is not really a button. I can type in it, but nothing appears as I type which is what should happen. Everything else works except this feature. I cannot continue to create the discount or cart rule without it.