Unable to Link Topography

When you try to link topography data to your model, the following message displays: Revit is unable to link the topography data at this time.

This error may be the result of various issues, as follows.

Network connection issues prevent the topography data from downloading successfully.

Desktop Connector isn't working. It may be in offline mode (not supported for linking topography) or closed, or it may have failed after you opened the Link Topography dialog.

Topography data cannot be created. This issue may occur when the topography data does not contain expected information about surfaces.

Topography data isn't ready. It is still in the process of being converted from its source file, and it's not yet ready for use in the Revit model.