WordPress is giving me 404 page not found for all pages except the homepage

Question

All of a sudden I go to my WordPress website and all the pages give me a 404 page not found page. I\'m assuming the problem lies with the permalink structure, which I could swea

Answer 1

I had this issue not so long ago. I had reset my permalink to default or just saved it, updated themes/core to (4.7.4)/plugins, deactivated all plugins, switched to default theme, optimized database, .htaccess is already default, checked file permissions, mod_rewrite is on.

So far nothing works, what works are the posts, new page, the /contact page EXCEPT for old pages.

Basically, the pages/URLs that aren't working are:

/breeding
/training
/training/*
/breeding/*

Ultimate, I found these files in the root folder:

/breeding.php and /training.php

I renamed both files and the pages above worked.