This means that the software cannot access the specified port and perform the required network connection operation. The possible reasons are as follows:

1. Port number error: the port number is the network data channel connecting the application. If the port number is wrong, the connection with the target server cannot be established.

2. Port occupied: If the specified port is occupied by other applications, the new generation report Operation 18 cannot connect with this port.

3. Network connection problem: If the network connection is not smooth or there are other problems, the new generation newspaper operation 18 may not be able to connect to the server through the port.