Hello @mimei  Thanks for reaching our community.  When you set nifi.web.https.host, that will be the only interface used for login.  If for some reason it does not reply properly or respond as 127.0.0.1, the web UI will never connect. And this looks like it's what is happening in your side:  2025-12-17 13:27:51,877 INFO [main] org.apache.nifi.web.server.JettyServer Started Server on https://vm-P004-4067:8443/nifi 2025-12-17 13:27:51,883 INFO [main] o.a.n.runtime.StandardManagementServer Started Management Server on http://127.0.0.1:52020 As you see, vm-P004-4067 it's answering on 127.0.0.1.  What you can do here is leave nifi.web.https.host empty or specifically set the IP you want to use for the connection.  Also, if you need to change the port, you can this setting: nifi.web.https.port ... View more