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 or removed.

Cause

This is Plesk bug  #PPPM-9016 that is planned to be fixed in one of the future product updates.

Resolution

Until a fix becomes available, it is possible to use one of the following workarounds:

Warning: bear in mind that enabling/disabling nginx can take a couple of minutes, during this time period sites will be offline. Proceed with the second workaround in case it is not suitable to have a downtime.

If nginx is installed:

1. Log into Plesk.

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

In case nginx is not installed:

1. Manage PHP handler via CLI:

   # plesk bin subscription -u example.com -php_handler_id plesk-php70-fpm
   SUCCESS: Update of domain 'example.com' completed.

2.  Enable nginx proxy mode for the affected domain via CLI (it will also unlock the possibility to choose the PHP version in GUI):

   # plesk bin subscription --update-web-server-settings example.com -nginx-proxy-mode true