How to stop my character from moving when I collect an item

Hi there.
I’m new to Unreal Engine and am making a demo game for schools. I have the standard 3rd person character that collects items in my map that then display an information widget. The problem I have is that, the character keeps running when I collect the item and the widget pops up! I’ve tried everything I can think of and can’t seem to find any video’s to help solve the issue. Any help will be much appreciated.

Kind regards