Selectors show error "A fatal error or timeout occurred while processing this directive"

Issue

When trying to access PHP, Python or NodeJS Selector, you can see this error: 

[A fatal error or timeout occurred while processing this directive.]

Environment

• CLOS
• Selectors
• cPanel

Solution

Our developers are investigating the situation right now together with cPanel team under a task ID CLOS-3778.

The current workaround is to run cPanel force update:

/scripts/upcp --force