Why do subpages not load htacess? - .htaccess

Question

My site is configured to automatically redirect to https://www.
However, if I try to access subpages I get a 404 error:
https://www.example.com.br/a-necessidade-de-dar-razao-da-fe/
My .htaccess:
RewriteEngine On
RewriteCond %{HTTPS} off
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?pag=$1&busca=$2 [NC,QSA]
RewriteCond %{HTTP:X-Forwarded-Proto} !https
RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteRule ^ https://www.%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

Answer 1

You have an erroneous RewriteCond directive that results in your front-controller (index.php) only being called when you are accessing the site via HTTP (not HTTPS), so attempting to request a page on HTTPS will naturally result in a 404.
You also have your directives in the wrong order. The HTTP to HTTPS (and canonical www) redirect should come first, however, you are also missing an OR flag so it would never redirect http://www.example.com to HTTPS.
Try the following instead:
RewriteEngine On
# HTTP to HTTPS and canonical www redirect
RewriteCond %{HTTP:X-Forwarded-Proto} !https [OR]
RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteRule ^ https://www.%{HTTP_HOST}%{REQUEST_URI} [L,R=301]
# Front-controller
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?pag=$1&busca=$2 [NC,QSA]
However, the $2 backreference will always be empty (you are only capturing a single pattern in your regex), so the busca URL parameter will always be empty.
This also assumes you are behind an SSL proxy.
Clear your browser cache before testing.