- Error: https://content.service.dkplan.niras.dk/api/silkeborg_lokalplaner/Default/GetPlanInfoExtended?planid=0 System.Net.WebException: The remote server returned an error: (500) Internal Server Error. at System.Net.WebClient.DownloadDataInternal(Uri address, WebRequest& request) at System.Net.WebClient.DownloadString(Uri address) at dkplan.responsive.viewer.Services.PlanService.GetPlanModel(Int32 planId, String kunde, String prefix, String postfix) in C:\projects\dkplan\dkplan.repsonsive.viewer\dkplan.responsive.viewer\Services\PlanService.cs:line 29