While this is similar to How to solve this Exception "Culture is not Supported"? I thought I'd post this as its specific to accessing a Web Service from a .NET application. I recently ported my very old project to a new machine with windows 11. The application has a call to a soap web service and I received this error:
System.Web.Services.Protocols.SoapException: Server was unable to read request. --->
System.InvalidOperationException: There is an error in XML document (1, 2001). --->
System.ArgumentException: Culture name 'en-il' is not supported.
Parameter name: name .....
It was working fine on the old machine.
The data service is sent a dataset (xml document) from the client to the server and then processes it on the server.