Error: System.ArgumentNullException: Value cannot be null. Parameter name: requestUriString at System.Net.WebRequest.Create(String requestUriString) at GaleriaMedios.GaleriadeMediosWP.GaleriadeMediosWP.<>c__DisplayClass4_1.b__0() at Microsoft.SharePoint.Utilities.SecurityContext.RunAsProcess(CodeToRunElevated secureCode) at Microsoft.SharePoint.SPSecurity.RunWithElevatedPrivileges(WaitCallback secureCode, Object param) at Microsoft.SharePoint.SPSecurity.RunWithElevatedPrivileges(CodeToRunElevated secureCode) at GaleriaMedios.GaleriadeMediosWP.GaleriadeMediosWP.getFileServer()