https://services1.arcgis.com/j6iFLXhyiD3XTMyD/ArcGIS/rest/services/CT_North_Canaan_Adv_Viewer_Parcels_View/FeatureServ
https://services1.arcgis.com/j6iFLXhyiD3XTMyD/ArcGIS/rest/services/CT_North_Canaan_Adv_Viewer_Parcels_View/FeatureServThis is a folder inside the services directory, not the server root. Trim back to /rest/services to connect to the whole server.