Problem with "Protocol header"

Hello for all.

you can help me with one question? This problem is this:

Code:

Protocol header error (Index: 1, Header: 3)

This error appears in ConnecServer, but, i can't find a reference on the internet on how to solve it.

This spoiler show the list of error:

Spoiler:

15:27:08 [SocketManager] Protocol header error (Index: 1, Header: 3)
15:27:08 [SocketManager] Protocol header error (Index: 0, Header: 3)
15:27:08 [SocketManager] Protocol header error (Index: 2, Header: 3)
15:27:08 [SocketManager] Protocol header error (Index: 3, Header: 3)
15:27:08 [SocketManager] Protocol header error (Index: 4, Header: 3)
15:27:09 [SocketManager] Protocol header error (Index: 5, Header: 3)
15:27:09 [SocketManager] Protocol header error (Index: 6, Header: 3)
15:30:38 [SocketManager] Protocol header error (Index: 1, Header: 3)
15:30:38 [SocketManager] Protocol header error (Index: 0, Header: 3)
15:30:39 [SocketManager] Protocol header error (Index: 2, Header: 3)
15:30:39 [SocketManager] Protocol header error (Index: 3, Header: 3)
15:30:39 [SocketManager] Protocol header error (Index: 4, Header: 3)
15:30:39 [SocketManager] Protocol header error (Index: 5, Header: 3)
15:30:39 [SocketManager] Protocol header error (Index: 6, Header: 3)
15:38:30 [SocketManager] Protocol header error (Index: 1, Header: 3)
15:38:30 [SocketManager] Protocol header error (Index: 0, Header: 3)
15:38:30 [SocketManager] Protocol header error (Index: 2, Header: 3)
15:38:30 [SocketManager] Protocol header error (Index: 3, Header: 3)
15:38:30 [SocketManager] Protocol header error (Index: 4, Header: 3)
15:38:31 [SocketManager] Protocol header error (Index: 5, Header: 3)
15:38:31 [SocketManager] Protocol header error (Index: 6, Header: 3)
16:17:55 [SocketManager] Protocol header error (Index: 1, Header: 3)
16:17:55 [SocketManager] Protocol header error (Index: 0, Header: 3)
16:17:55 [SocketManager] Protocol header error (Index: 2, Header: 3)
16:17:55 [SocketManager] Protocol header error (Index: 3, Header: 3)
16:17:56 [SocketManager] Protocol header error (Index: 4, Header: 3)
16:17:56 [SocketManager] Protocol header error (Index: 5, Header: 3)
16:17:56 [SocketManager] Protocol header error (Index: 6, Header: 3)
16:51:59 [SocketManager] Protocol header error (Index: 3, Header: 3)
16:51:59 [SocketManager] Protocol header error (Index: 4, Header: 3)
16:51:59 [SocketManager] Protocol header error (Index: 5, Header: 3)
16:51:59 [SocketManager] Protocol header error (Index: 6, Header: 3)
16:51:59 [SocketManager] Protocol header error (Index: 1, Header: 3)
16:52:00 [SocketManager] Protocol header error (Index: 0, Header: 3)
16:52:00 [SocketManager] Protocol header error (Index: 2, Header: 3)

The first thing i thought is that it would be something with the VPS port, but it doesn’t make sense to connect to the client normally with a problem with the port. :/:

The second, perhaps the least likely, thing would be an anti-hack DLL, but I don't have that on the client. :(:

Have you been through this? How to identify the problem?