Forge 1.12.2 Server Not Able To Join

The Aternos forums are now deprecated

Learn more about this change here.

For help regarding Aternos, we recommend you to visit our support center.

  • Hello, so my Forge 1.12.2 minecraft server starts regularly however nobody can connect to it. It gives us the error "Fatally missing registries" and then gives us some long error message (I attached a screenshot of it). I tried deleting some mods and even resetting the server but it doesn't work. Any ideas on how to fix this please?


    Attachment of the error message it shows for us

  • MyNameAlan

    Changed the title of the thread from “Forge 1.12.2 Not Able To Join” to “Forge 1.12.2 Server Not Able To Join”.
    • Official Post

    The error message "fatally missing registry entries" typically appears when the installed mods on the player's computer do not match the installed mods on the server.


    For modded servers, players must have the exact same mod collection installed on their computer as the server.

    It is important that the version of the installed mods is identical as well as the version of Forge itself!


    If you have so called client-only or server-only mods installed, it may help to temporarily remove them.