Greetings,
Currently, all Worlds on the North America data center, except for Dynamis Worlds, are at their login limit. Aether Data Center in particular has long queues for each of its Worlds.
Those who are looking to avoid login queues are recommended to use Data Center Travel to visit the Dynamis Data Center as it still has room to accommodate players. Once the World login limit is reached, the stress placed on the server is substantial. So, as a precaution against Worlds going down under heavy loads, those who are currently away from their Home World may be unable to return temporarily.
While we experienced issues surrounding returning to Home Worlds at the start of early access, the current message: "Unable to select [World] as a destination for Return to Home World requests at this time" is normal. This means your Home World is at capacity and not accepting logins or returns. While unable to return to your Home World, you may continue to play on your current World and try to return again later.
We appreciate your understanding as we work to keep the service operating optimally.