Sometime yesterday afternoon, ArcGIS Online's "Add Layer from Web" feature stopped working. Pasting the URL of a public CSV file now triggers an error message:
The CSV, [URL], is not accessible and cannot be added to the map.
Contrary to what the message claims, my CSV (a table hosted by Google Sheets) is accessible. The problem seems to be on ArcGIS's side.
Any idea what might be happening—and when this might be fixed?