Installing SSL for codeigniter

Hi,

I have installed SSL on my server.

In config.php file I changed $config['base_url'] = 'http://doc.example.com/'; to $config['base_url'] = 'https://doc.example.com/'; and $config['index_page'] = 'index.php'; to $config['index_page'] = ''; to remove index.php from URL.
Unfortunately URLs for HTTPS requests except of home page do not work properly. As a result URLs like https://doc.example.com/page1 return "page to found".
My .htaccess

Code:

<IfModule mod_rewrite.c>
RewriteEngine On

RewriteCond %{HTTPS} !=on
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?/$1 [L]
</IfModule>

Options -Indexes

I use CI v3.1.11.

Could someone please help me?

UPDATE
Setting AllowOverride All in apache2.conf solved the problem.