Pumpkin-MC/Pumpkin · warning · InventoryError

Player does not have enough permissions

Error message

Player does not have enough permissions

What it means

InventoryError::PermissionError is raised when the player lacks the permission required to perform the requested inventory operation (e.g., interacting with a container or using a creative-inventory action they are not allowed to). The library throws it as an authorization gate before mutating inventory state, mirroring vanilla server behavior that rejects unauthorized interactions.

Solutions

1. Check the player's gamemode/permission before sending inventory-affecting actions; only clients in creative may send creative inventory packets.
2. If legitimate players are blocked, grant the required permission in your permissions plugin/configuration.
3. If you are writing a plugin, gate your own inventory interactions behind the same permission check so you fail fast with a clear message.
4. For hostile clients, treat the error as a protocol abuse signal and consider kicking or logging the player.

Example fix

// before: allowing the action then hitting the error
player.handle_inventory_click(packet);
// after: pre-check permission
if !player.has_permission("inventory.interact") {
    player.send_message("You cannot do that");
    return;
}
player.handle_inventory_click(packet);

// Rust: pre-check the permission
if !player.has_permission("inventory.interact") {
    player.send_system_message("You lack permission for this action");
    return;
}

fn can_interact(player: &Player) -> bool { player.has_permission("inventory.interact") }

match op.run(player) {
    Err(InventoryError::PermissionError) => player.send_system_message("Not allowed"),
    Err(e) => return Err(e.into()),
    Ok(()) => {}
}

When it happens

Trigger: A non-op/non-creative player sends a creative inventory action packet; a player interacts with a container or performs an inventory operation whose required permission (e.g., gamemode/interaction permission) they do not hold; a server plugin restricts container access and the check fails.

Common situations: Survival-mode clients sending creative-screen packets (common with hacked clients); server operators restricting container access via permissions while players attempt it anyway; misconfigured permission groups that unintentionally remove inventory interaction permissions.

Understand the failure class

Background: "You do not have permission" / 403 Forbidden errors: authenticated but not allowed — causes and fixes across open-source libraries — this error's family across 31 libraries.

Related errors

• Invalid inventory packet
• JWT chain validation failed
• The validated username is invalid
• Could not parse UUID from validated token
• Cannot accept self-signed token. Authentication is enforced…

AI-assisted analysis of Pumpkin-MC/Pumpkin@8d4639e25a (2026-09-09). Data as JSON: /api/errors/48983094366e5711. Report an issue: GitHub.

Appendix: source

Thrown at crates/pumpkin-inventory/src/error.rs:30

    /// The specified slot index is invalid or out of bounds.
    #[error("Invalid slot")]
    InvalidSlot,
    /// A player attempted to interact with a container that is closed.
    ///
    /// The parameter is the player's entity ID.
    #[error("Player '{0}' tried to interact with a closed container")]
    ClosedContainerInteract(i32),
    /// Multiple players attempted to drag items in the same container simultaneously.
    #[error("Multiple players dragging in a container at once")]
    MultiplePlayersDragging,
    /// Drag operation was performed out of order (e.g., end before start).
    #[error("Out of order dragging")]
    OutOfOrderDragging,
    /// The received inventory packet is malformed or invalid.
    #[error("Invalid inventory packet")]
    InvalidPacket,
    /// The player lacks permission to perform this inventory operation.
    #[error("Player does not have enough permissions")]
    PermissionError,
}

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