net::ERR_CONNECTION_REFUSED

The application tried to connect to a server, but the server is either not running or not accepting connections on the specified port. This can happen if the server is down or if there are firewall rules blocking the connection.

The root cause of the error is that the server is not reachable at the specified address and port. This could be due to the server being offline, a misconfiguration in the server settings, or network issues preventing access.

To fix this issue, ensure that the server is running and listening on the correct port. Check firewall settings to make sure that the port is open and accessible. If necessary, restart the server or check its configuration for any errors.