PREVIOUS/NEXT PAGE doesn't function

whenever i click on previous/next page, it still loads the same posts.

this is my index.php code

https://pastebin.com/0STH5kgH

…. please lemme know where i went wrong.

double checked everything… tried disabling some plugins and checked…still doesnt work.

pls enlighten me on what to do. thanks.

[duplicate: https://www.ads-software.com/support/topic/older-posts-function-not-working?replies=3
please start only one topic per problem, and continue with your original thread]