System.Net.Sockets.SocketException

I have a website that accesses an API. when I run it on my localhost it works fine.

but when I publish on the server I get an error.

Unable to connect to the remote server System.Net.Sockets.SocketException (0x80004005):
A connection attempt failed because the connected party did not properly respond after a period of time,
or established connection failed because connected host has failed to respond 10.10.9.108:50300
at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress)
at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket,
IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception)

Asking you for your advice.

Thank you,