Perl and Python support in Plesk can be enabled in Service Plan, but it is disabled on the subscription

Symptoms

• Perl and Python Support can be enabled at Plesk > Service Plans > example > Hosting Parameters
  

  

• While navigating to Plesk > Subscriptions > example.com > Account > Hosting options, Perl and Python Support are marked as disabled
  

  

Cause

Perl and Python support has been dropped in Plesk since Plesk 12.5.

The bug regarding the presence of Perl and Python check-boxes has ID PPPM-9177 which is planned to be fixed in future Plesk updates.

Resolution

There is no workaround available.

To avoid synchronization issues do the following for each service plan on the server:

1. Log in to Plesk.
2. Open Service plans > click on service_plan_name > open tab "Hosting parameters" and disable check-boxes "Perl support" and "Python support". 
3. Press "Update & sync" button.

Additional information

Why mod_perl, mod_python, mod_php Apache modules are not installed by default starting from Plesk 12.5?