Why are the internal pages of the site on WP not opening?

Question

WordPress

The site f2.jyrig.me is on WordPress, the problem is that the internal links of the site do not open (the menu is pulled on the vp).
If you upload another page (for example, page.php) to the site directory in addition to the main (index.php), index.php cannot be opened in the menu.
Probably the answer is simple, please help!

Answer 1

Check .htaccess

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress

Answer 2

1) remove htaccess
2) go to admin - Settings - Permalinks and refresh
page.php index.php single.php etc. they are just templates...
For example. single.php outputs the
page.php entries of the page
And here is how the url will look like, see the section Permalinks