[2023] App Authentication failed?

Would need the full logfile of the server, you can send that to [email protected]: https://github.com/StrangeLoopGames/EcoIssues/wiki/Getting-the-Eco-server-and-client-log-files-for-local-world

Typically if you're receiving an authentication error, there is a problem with networking to reach the auth servers. Eco authenticates server-side, so when hosting a local game it needs to get through to the auth servers - on multiplayer games you might not notice any problems, as the server can get through.

Typical things to check, especially after new updates is if antivirus is correctly exempted or turned off, no VPN or network changing modifications are running, firewalls being correctly setup, etc.

Yes, that's a network issue, as mentioned in my first reply, your're timeouting when requesting authentication.

We did have reports of Eco not working with Starlink, actually, but if your Laptop can do it fine, that's probably not the case. Did you try just restarting the router (or whatever is used for Starlink), sometimes that has solved such issues in the past for other people on normal connections.