I have a Feature Layer that has been live for 8 months or so, and all of a sudden I am getting a message "...Cannot be added to the map." when trying to view the map. When I try to add the layer back to the map, I get the message "Unavailable" in the Search for Layers pane. And when trying to access the Data tab, I see a message "There was an Error."
Has anyone else experienced this? There hasn't been any changes to this Feature Layer in over 8 months, and it just started doing this.