Error: Map Download Failed. Unable to download the map. Empty username/password
Adding an Esri basemap for offline use from Portal for ArcGIS to Collector for ArcGIS returns the error:
Map Download Failed. Unable to download the map. Empty username/password
The following are possible causes for this issue.
Esri basemaps are not configured for offline usage by default.
An incorrect Esri basemap service URL is referenced. The service URL is referencing http://services.arcgisonline.com/rest/services, which is the root directory for ArcGIS Online services, which allows navigation of listed services, resources and associated operations in ArcGIS Online. However, it does not provide the option for maps to be downloaded for offline usage.
Solution or Workaround
Depending on the cause, follow the instruction listed below.
To use an Esri basemap with a Portal for ArcGIS map offline, an account which is part of an organization in ArcGIS Online, Portal 10.2.2 for ArcGIS or later, and ArcGIS 10.2.2 for Server or later are required.