Ipfs pubsub C# error unity

I am trying to install the library’s Ipfs.http.client or ipfs.engine on unity. But errors constantly occur, for example, The method or operation is not implemented.
Apps.Engine.CoreApi.PubSubApi.Subscribe when I try to subscribe to a channel with the command " wait ips.PubSub.Subscribe(“test”, Handler, CancellationToken.None);" or unity does not see http dependencies in unsing Ipfs.http. Who knows how to properly configure this library for unity? I ask for help, I have been sitting with these problems for 3 days!!!

Which C# client are you using? Can you contact the authors on their repository?