Common causes of WordPress 403 errors on Plesk and their solutions

Solution: Fixing HTTP to HTTPS Redirection Issue

The site https://shopalway.co.za/ works fine, but the error occurs when visiting http://shopalway.co.za/. This indicates an SSL issue. You can verify your SSL using: SSL Checker
.

Fix: Add the following lines to your .htaccess file to force HTTPS:

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

This will redirect all HTTP requests to HTTPS automatically.