This question was answered by @clivestrydom:

Apologies, here is the correct htaccess file:

Options +FollowSymLinks
RewriteEngine On
RewriteBase /

RewriteCond %{SERVER_PORT} 80 
RewriteRule ^(.*)$ https://www.properorder.co/$1 [L,R=301,NC]

# RewriteCond %{SERVER_PORT} 443
# RewriteRule ^(.*)$ https://www.properorder.co/$1 [L,R=301,NC]

RewriteCond %{HTTP_HOST} !^www.properorder\.co [NC]
RewriteRule ^(.*)$ https://www.properorder.co/$1 [L,R=301,NC]

View the original comment

Hello,

You can try with some of the following rules:

The following forces any http request to be rewritten using https. For example, the following code forces a request to http://example.com to load https://example.com. It also forces directly linked resources (images, css, etc.) to use https:

RewriteEngine On
RewriteCond %{HTTPS} off
RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI} [R,L]

The below code when added to an .htaccess file will automatically redirect any traffic destined for http: to https:

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

Let me know how it goes.

Regards,
Alex