Rudder tools

When I setup a dev box it seems that the acceptation time take too many time with an HTML page with 404 error at the end.
OS: debian 10

dev.json :

{
  "default":{ "rudder-version": "6.2-nightly", "system": "debian10", "inventory-os": "debian" },
  "server": { "rudder-setup": "server", "server-type": "dev" },
  "relay":  { "rudder-setup": "relay" },
  "agent1": { "rudder-setup": "agent", "server": "relay" },
  "agent2": { "rudder-setup": "agent", "system" : "debian6" }
}