Hey there, please see Your world is taking longer than expected to start- what this is, and how to fix it
Usually when this occurs, it is because Foundry is starting up and not responding to requests, such as when it is loading large packages or when it is migrating world data.
In most cases, simply waiting a minute before accessing the server again allows access. If this does not work, please check your Foundry server logs from The Forge to see if Foundry is logging an error indicating that it is not able to start up.
