laravel project not working with https in production server

I am using laravel 5.5 version for my project, in production server our website is not working on https url, its only working with http. our website is enabled with ssl certificate. when try to open website with https its showing blank page..can anyone help me with this my htacces code is shown below

Options -MultiViews -Indexes

RewriteEngine On

# Handle Authorization Header
RewriteCond %{HTTP:Authorization} .
RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]

# Redirect Trailing Slashes If Not A Folder...
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} (.+)/$
RewriteRule ^ %1 [L,R=301]

# Handle Front Controller...
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^ index.php [L]

via Chebli Mohamed