Pagination gives result undefined when product grids used in pages

Hello,

I have found my site in google with a few urls ending i “undefined”. This seems to happend on all standard pages where i am using product grid elements. When i click on load more or using auto-scroll the “undefined” appear in the url in browser. When any user click an url like this in google they get a 404.

I belive there is a pagination script not loaded when in a standard page? You can see the issue in the attached url to my store.

If so, is there any way to correct this?

Brgds
Rune