PHP support cannot be enabled for one domain in Plesk when nginx service is stopped

Symptoms

• PHP handler cannot be changed when nginx service is stopped

• PHP-support is grayed-out with "PHP support cannot be enabled because current hosting configuration does not include any PHP versions available for this domain" in Websites & Domains > Hosting settings

• Alongside on the main "Websites & Domains" page under "PHP Settings" particular PHP version is selected

• nginx is stopped

Cause

Plesk product bug #PPPM-9016

Workaround

1. Log into Plesk as admin

2. Start nginx in Plesk:
   Go to Tools & Settings > Services Management > Reverse Proxy Server (nginx) click icon.

3. Enable nginx proxy mode for the domain:
   Go to Domains > example.com > Apache & nginx Settings
   in nginx settings section check Proxy mode checkbox

4. Stop nginx service in Plesk:
   Go to Tools & Settings > Services Management > Reverse Proxy Server (nginx)  click icon