The website is not accessible:
CONFIG_TEXT: Server not found
CONFIG_TEXT: Could not locate remote server
CONFIG_TEXT: This page can’t be displayed
CONFIG_TEXT: This site can’t be reached
Web Server's Default Page may be shown instead of the site's content.
The website works properly over HTTP or redirects to HTTPS:
# curl -I http://example.com/ -v
* About to connect() to www.example.com port 80 (0)
* Trying 203.0.113.2... connected
< Location: https://example.com/
SSL/TLS Support option is disabled in Domains > example.com > Hosting Settings.
Redirection to HTTPS is hardcoded in website code, but not enabled in Plesk.
Note: if you don't have administrative access to Plesk server via SSH or RDP, contact your hosting provider regarding the issue
Go to Subscriptions > example.com > Domains & Websites > Hosting Settings and enable 'SSL\TLS support' option: