So this is the description for Server settings in the ACP:

"Run periodic tasks from system cron:
When off, phpBB will arrange for periodic tasks to be run automatically. When on, phpBB will not schedule any periodic tasks by itself; a system administrator must arrange for bin/phpbbcli.php cron:run to be run by the system cron facility at regular intervals (e.g. every 5 minutes)."

The choices, however, are "Yes" and "No".

So is Yes On?  If so, that setting would appear to disable automatic Cron tasks, so maybe No is right?  The setting is to run tasks from cron, so Yes would appear to be the right choice?  Or would it?

How about making the choices "On" and "Off"?