Usually like that when services not available. Might be because ArcGIS server is not visible, service is faulty or your machine can't access the service (permissions or rights).In application builder, go to configure layers and look at service definition for specific layer that has issues.
サインインしたメンバーは投稿、更新のフォローなどができます。初めてですか?無料アカウントを登録してください。
Find useful guides, FAQs, and documents to help you navigate and make the most of Esri Community.