[.naming.updater] com.alibaba.nacos.client.naming : [NA] failed to request java.net.ConnectException: Connection refused: connect

This error message indicates that the Nacos client was unable to connect to the Nacos server. The most likely cause of this error is that the Nacos server is not running or is not accessible from the client's network. To resolve this issue, ensure that the Nacos server is running and accessible from the client's network, and check for any network configuration issues that could be preventing the client from connecting to the server.