The connection to the server 192.168.75.80:6443 was refused - did you specify the right host or port?

This error message indicates that the client is unable to connect to the specified server at the given IP address and port number. There could be several reasons for this, including:

1. The server is not running or is not accessible from the client machine.
2. The server is running on a different port or IP address.
3. There is a firewall or network configuration issue preventing the client from connecting to the server.

To resolve the issue, you can try the following steps:

1. Verify that the server is running and accessible from the client machine.
2. Check that you have specified the correct IP address and port number for the server.
3. Ensure that there are no firewall rules or network configurations blocking the client from accessing the server.
4. Try connecting to the server from a different machine to see if the issue is specific to the client machine.