Multiserver: Can not attach service node: Wrong value of php_handler_id

Symptoms

• Trying to attach service node results in the error:

  'PLESK_ERROR: 'Wrong value of php_handler_id, it can take only cgi, fastcgi, fpm, module, plesk-php56-cgi, plesk-php56-fastcgi, plesk-php56-fpm, plesk-php70-cgi, plesk-php70-fastcgi, plesk-php70-fpm, plesk-php71-cgi, plesk-php71-fastcgi, plesk-php71-fpm

• On the management node the following can be found in /usr/local/psa/admin/logs/panel.log ( with enabled debug ):

  PLESK_INFO: DEBUG [extension/plesk-multi-server] Remote Plesk API-RPC request to 203.0.113.2:
  <packet version='1.6.9.0'><service-plan>
  <add>
  <name>SERVICEPLANNAME</name>
  . . .
  DEBUG [extension/plesk-multi-server] Remote Plesk API-RPC response from 203.0.113.2:
  . . .
  <status>error</status>
  <errcode>1019</errcode>
  <errtext>Wrong value of php_handler_id, it can take only cgi, fastcgi, fpm, module, plesk-php56-cgi, plesk-php56-fastcgi, plesk-php56-fpm, plesk-php70-cgi, plesk-php70-fastcgi, plesk-php70-fpm, plesk-php71-cgi, plesk-php71-fastcgi, plesk-php71-fpm</errtext>
  
  

Cause

Unknown.

Resolution

Re-apply PHP Settings of the service plan. Go to Service Plans > SERVICEPLANNAME > 'PHP Settings' and press OK