Error: System.Net. WebException: The Remote Server Returned an Error: (401) Unauthorized (Opening Revit®)

Upon opening Revit with the Planting F/X plugin installed, you saw an error message similar to the following:

An error occurred when attempting to fetch a request.

Error: System.Net. WebException: The remote server returned an error: (401) Unauthorized.

at System.Net.WebClient.DownloadDatalnternal(Uri address,

WebRequest& request)

at System.Net.WebClient.DownloadString(Uri address) at LandFXRevitUtil.Util.WCDownloadString(String url, String authtoken)

WebException: "The remote server returned an error: (401)
Unauthorized."

StackTrace:

System.Net. WebClient { private bytel]

DownloadDataInternal(System.Uri address,

System.Net.WebRequest& request) {...}} in '' Ln O

System.Net. WebClient { public string

DownloadString(System.Uri address) {...}} in '''' Ln 0

LandFXRevitUtil.Util { public static string

WCDownloadString(string url, string authToken) {... }} in "'' Ln0"