If I create a script with the scope "Action operation" (no MediaType Webhook), the script will be executed correctly when the action is triggered, but will be shown as incorrectly executed in the event/probems view.

Error message:
 cannot execute script: (null)

The attempts with "return 'OK';" or the omission of "return;" were also unsuccessful.

Code:
try {
// do something
return true;
} catch (error) {
Zabbix.Log(4, '[Webhook] Failed: '+error);
throw error;
}