Nimble filters not working

installed Nimble plugin, created 4 portfolio items and created 2 filters and attached to portfolio items to each filter. Generated shortcode and added to new page. Published page and previewed.

4 empty white circles were displayed initially with the ‘all’ filter defaulted. Selecting either of the 2 created filters caused the initial filtering and then the screen quickly went blank.

Clicking on an empty white circle popped up the correct image – I did get multiple images like a lot of people but I will follow the input on that issue if I can get this initial stuff resolved