Filter stays in loop?

Hi!

The plugin worked for a while, but now the filter stays in a loop? As you can see at the page https://www.wandelstokkopen.nl/winkel/

Also at this page the my account button in the header is totally black. This icon was only a line. When i remove the filter, the normal account button in the header is loading in..

Does somebody knows what happening?

Kind regards,

Twan

The page I need help with: [log in to see the link]