Why there is no redirect from http to https to access Plesk login page?

Create the corresponding subscription in Plesk:

1. Log in to Plesk GUI

2. Create a new subscription in Subscriptions > Add Subscription with the name example.com

3. Go to Subscriptions > example.com > Hosting settings

4. Tick the options SSL/TLS support and Permanent SEO-safe 301 redirect from HTTP to HTTPS

5. Click the OK button

1. Connect to the server via SSH

2. Create the file /var/www/vhosts/default/htdocs/.htaccess with the following content:

   RewriteEngine On
   RewriteCond %{HTTPS} !=on
   RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301,NE]
   Header always set Content-Security-Policy "upgrade-insecure-requests;"