A website hosted in Plesk shows wrong website content when opened over HTTPS after migration from a legacy Plesk version

Symptoms

• A website has been migrated to Plesk from a legacy Plesk version.

• When opening this website in a web-browser, it loads the real content over HTTP, but different over HTTPS. For HTTPS, it also can be a Plesk default page or Apache test page.

• Opening other pages of the website over HTTPS result in "404 Not Found" or "403 Forbidden".

Cause

The domain is running in "Separate SSL/TLS and non-SSL/TLS content" compatibility mode.

Domains in Plesk 11 and earlier releases had their content stored in separate directories for HTTP and HTTPS:

• 
/var/www/vhosts/example.com/httpdocs - for HTTP content
• 
/var/www/vhosts/example.com/httpsdocs - for HTTPS content

Resolution

1. Connect to the Plesk server via SSH.

2. Disable the compatibility mode in the Plesk database:

   # plesk db "UPDATE hosting set same_ssl='true' WHERE same_ssl='false';"

3. Repair web-server configuration:

   # plesk repair web -y