add an if to avoid undefined error

npm/ng-packs/packages/feature-management/src/lib/components/feature-management/feature-management.component.ts

@@ -83,6 +83,7 @@ export class FeatureManagementComponent
 
   getFeatures() {
     this.service.get(this.providerName, this.providerKey).subscribe(res => {
+      if (!res.groups?.length) return;
       this.groups = res.groups.map(({ name, displayName }) => ({ name, displayName }));
       this.selectedGroupDisplayName = this.groups[0].displayName;
       this.features = res.groups.reduce(