Connection issues with Azure SQL Hybrid to local SQL Server

I have an App Service installed on Azure. I try to write data in a local SQL server database (through ADO.Net commands). The sql server has a hybrid connection installed and configured. The status of the connection is "connected".

The SQL user can connect and write data through SQL Management Studio. It is a SQL server 2014 and windows server 2019.

Here is the error message I get:

System.Data.SqlClient.SqlException (0x80131904): A connection was successfully established with the server, but then an error occurred during the pre-login handshake. (provider: TCP Provider, error: 0 - An existing connection was forcibly closed by the remote host.) ---> System.ComponentModel.Win32Exception (0x80004005): An existing connection was forcibly closed by the remote host