infinite scroll fine with admins but no more posts with visitord

Infinite scroll plugin works fine when logged in as administrator, but when accessed as a visitor it shows: “you’ve reached the end of the internet” immediately no matter what page it’s loaded from…
I’ve tried a lot of selectors and it’s the same problem…
Any help… hint… even just what you think is really appreciated…
I am testing it on https://www.test.coolestech.com, as soon as it’s working fine I’ll activate it on the actual website https://www.coolestech.com