Hello,
I am trying to set some promos & discounts on my shop, I had been able to do so previously with no problems, but now when i want to select products/manufacturers/categories etc the screen looks like this:
and if i click on add button nothing happens. Previously it showed a pop up from which i could select them.
I can select all other options (carrier, compatibility, etc) without problems.
Please advise on how to fix this