Help in fixing code c# SignalR and SqlTableDependency

Job ID: 32556287

Budget: $10 – $30 USD

I have a simple code c# asp.net core 3.1
that contains a library SignalR
and library SqlTableDependency
The Client is connecting well, but when I want to send it to it, it disconnects the connection and then reconnects
I don't know what the problem is
I want to help fix this problem
Related categories: .NET C# Programming ASP.NET Microsoft SQL Server