I'm trying to create a proof-of-concept client in c# using Dotnet Standard Client version 5.0.5. It works when I point it at your push.lightstreamer.com DEMO server. When I point it at my data provider's server and logon according to the instructions they provided, it appears that my credentials are recognized and a connection is established.

Then I get a client listener onServerError with errorCode = 60 errorMessage = “License not valid for this Client version”.

What does this mean? What do I need to do?

Thanks.