Pagination links redirect back

Hi, I have a problem with pagination on my page.
I am trying to display list of other posts in post page. For more than 10 posts is enable pagination. On localhost it works but not on server. When I click on “Previous posts link”, that redirect me back.

You can try it here:
https://dev.cuptech.eu/cs/nezarazene/idea-sloup/

Try click on “Star?í p?íspěvky” in left column. You should be redirect to:
https://dev.cuptech.eu/cs/nezarazene/idea-sloup/page/2/
but you are redirect back to https://dev.cuptech.eu/cs/nezarazene/idea-sloup/

Please can somebody help me with this??
Thanks