Check that policy is defined in enforcementStatusLabel

ee/app/assets/javascripts/threat_monitoring/components/policy_editor/policy_drawer.vue

@@ -29,7 +29,10 @@ export default {
       return removeUnnecessaryDashes(this.value);
     },
     enforcementStatusLabel() {
+      if (this.policy) {
         return this.policy.isEnabled ? __('Enabled') : __('Disabled');
+      }
+      return null;
     },
   },
 };