Articles on: Fix a problem

I can't connect to CubeCraft

"Outdated client" or "Outdated server"


Your game version is not one we support. See [Which version do I need, and how do I update? xxx]


"Outdated server" usually means you updated before we did. That gap is normally a few days after a major Minecraft release.


"You are blocked" with a code starting with C or V


This is a connection block, not a ban on your account. See [Why is my connection blocked?] for what it means and how long it lasts.


It is automatic, it cannot be appealed, and nobody on the team can shorten or lift it.


"Not Authenticated with Minecraft.net" (Java)


  1. Fully close and reopen the Minecraft Launcher.
  2. Sign out of your Microsoft account in the launcher, then sign back in.
  3. Try again.


If you use a cracked or offline launcher, including TLauncher, you will always get this error. CubeCraft requires a legitimate account and there is no workaround.


If you own the game and the error persists after a restart, the problem is with Minecraft's authentication rather than with us. Contact Minecraft support.


"Invalid session" (Java)


Restart the game. This generates a new token/key allowing you to access Minecraft's multiplayer services. If restarting does not work, sign out of your account and back in.


If you also see "Authentication servers are under maintenance", Mojang's login service is down. Nobody can connect to any server until it returns.


"An error occurred obtaining your user ID"


This is currently a known bug across our network. Our development team are working on a fix, however in the meantime we recommend to restart your Minecraft client as this helps to resolve the issue.


"Server is down for maintenance"


Nobody can join during maintenance. It is announced on our Discord and Instagram account. Try again later.


My game fully crashes


This is a known issue caused by Microsoft. See their bugs board for more information.

It times out, or I lag badly


  1. Restart your router.
  2. Turn off any VPN.
  3. Disconnect other devices using the connection heavily.
  4. If it continues, run a netcheck and send us the result. See [Run a netcheck xxx].


Still stuck?


Send us an email at support@cubecraft.net with all five of these:


  • your username,
  • your platform,
  • your exact game version,
  • the exact wording of the error (or a screenshot),
  • what you already tried.


Almost every "can you send more details?" reply from us is asking for one of those five. Including them all up front usually saves a day.

Updated on: 17/08/2026

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