wp-pagenavi is not working

Hi,

i am passing one variable after the page name. like

https://artbuy.in/wp/gallery/1/ it works

when i am using wp-pagination and click the next page it doent works,it directly goes to home page the url is like this

https://artbuy.in/wp/gallery/1/page/2

What is the problem i dont get this. please help with this.