Fixed notification rules page not working when rule saved without additional config

ui-ngx/src/app/modules/home/pages/notification/rule/rule-table-config.resolver.ts

@@ -81,7 +81,7 @@ export class RuleTableConfigResolver implements Resolve<EntityTableConfig<Notifi
         (rule) => this.translate.instant(TriggerTypeTranslationMap.get(rule.triggerType)) || '',
         () => ({}), true),
       new EntityTableColumn<NotificationRule>('additionalConfig.description', 'notification.description', '30%',
-        (target) => target.additionalConfig.description || '',
+        (target) => target.additionalConfig?.description || '',
         () => ({}), false)
     );
   }

ui-ngx/src/app/shared/models/notification.models.ts

@@ -116,7 +116,7 @@ export interface NotificationRule extends Omit<BaseData<NotificationRuleId>, 'la
   triggerType: TriggerType;
   triggerConfig: NotificationRuleTriggerConfig;
   recipientsConfig: NotificationRuleRecipientConfig;
-  additionalConfig: {description: string};
+  additionalConfig?: {description: string};
 }
 
 export type NotificationRuleTriggerConfig = Partial<AlarmNotificationRuleTriggerConfig & DeviceInactivityNotificationRuleTriggerConfig &