WebSocket Server is causing the error message below every 5 seconds

[9/9/2023 4:37:00 AM] DEBUG <>c__DisplayClass66_0.b__0:791

System.IO.IOException: Authentication failed because the remote party has closed the transport stream.
at System.Net.Security.SslState.StartReadFrame(Byte[] buffer, Int32 readBytes, AsyncProtocolRequest asyncRequest)
at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest)
at System.Net.Security.SslState.ForceAuthentication(Boolean receiveFirst, Byte[] buffer, AsyncProtocolRequest asyncRequest, Boolean renegotiation)
at System.Net.Security.SslState.ProcessAuthentication(LazyAsyncResult lazyResult)
at WebSocketSharp.Net.WebSockets.TcpListenerWebSocketContext..ctor(TcpClient tcpClient, String protocol, Boolean secure, ServerSslConfiguration sslConfig, Logger log) in D:\WebSocketSharp\websocket-sharp\websocket-sharp\Net\WebSockets\TcpListenerWebSocketContext.cs:line 93
at WebSocketSharp.Server.WebSocketServer.<>c__DisplayClass66_0.b__0(Object state) in D:\WebSocketSharp\websocket-sharp\websocket-sharp\Server\WebSocketServer.cs:line 791

Start with Net/WebSockets/TcpListenerWebSocketContext.cs at line 93 and Server/WebSocketServer.cs at line 791, using the reported SslState stack trace as the entry point. Reproduce the repeated authentication failure if possible and inspect the surrounding connection-handling flow. Done means identifying why the remote party closes the transport stream and verifying the resulting behavior.