Hello Esri Community,
We recently upgraded our ArcGIS Enterprise deployment from 11.3 to 11.5 (Portal 11.5.0, Server 11.5.0, Data Store 11.5.0). Since the upgrade, all hosted feature layers publish successfully and appear in Portal for ArcGIS . The Data tab loads correctly and displays attribute tables. However, whenever we click the Visualization tab in Map Viewer for any feature layer—whether newly published or existing—the entire page under the tab header remains blank and never finishes loading. The Page stays blank indefinitely. This happends when I open any Web Map.
Users cannot preview or style any hosted feature layers in Portal’s Map Viewer, severely hindering content management and visualization workflows.
