bevyengine/bevy · error · MissingAssetLoaderForExtensionError

no `AssetLoader` found{}

Error message

no `AssetLoader` found{}

What it means

MissingAssetLoaderForExtensionError — no registered AssetLoader handles the given file extension(s); format_missing_asset_ext appends the missing extension list to the message. Register a loader for the extension (or check for typos in the path) before loading.

Source

Thrown at crates/bevy_asset/src/server/mod.rs:2318

    /// The error the loader reported when attempting to load the asset.
    ///
    /// If you know the type of the error the asset loader returned, you can use
    /// [`BevyError::downcast_ref()`] to get it.
    pub fn error(&self) -> &BevyError {
        &self.error
    }
}

/// An error that occurs while resolving an asset added by `add_async`.
#[derive(Error, Debug, Clone)]
#[error("An error occurred while resolving an asset added by `add_async`: {error}")]
pub struct AddAsyncError {
    error: Arc<dyn core::error::Error + Send + Sync + 'static>,
}

/// An error that occurs when an [`AssetLoader`] is not registered for a given extension.
#[derive(Error, Debug, Clone, PartialEq, Eq)]
#[error("no `AssetLoader` found{}", format_missing_asset_ext(extensions))]
pub struct MissingAssetLoaderForExtensionError {
    extensions: Vec<String>,
}

/// An error that occurs when an [`AssetLoader`] is not registered for a given [`core::any::type_name`].
#[derive(Error, Debug, Clone, PartialEq, Eq)]
#[error("no `AssetLoader` found with the name '{type_name}'")]
pub struct MissingAssetLoaderForTypeNameError {
    /// The type name that was not found.
    pub type_name: String,
}

/// An error that occurs when an [`AssetLoader`] is not registered for a given [`Asset`] [`TypeId`].
#[derive(Error, Debug, Clone, PartialEq, Eq)]
#[error("no `AssetLoader` found with the ID '{type_id:?}'")]
pub struct MissingAssetLoaderForTypeIdError {
    /// The type ID that was not found.
    pub type_id: TypeId,

View on GitHub (pinned to 227d3a6c66)

Solutions

1. Register an AssetLoader that handles the extension (e.g. via init_asset_loader)
2. Check the file extension for typos
3. Use a format whose loader is already registered

When it happens

Trigger: Thrown at crates/bevy_asset/src/server/mod.rs:2303 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of bevyengine/bevy@227d3a6c66 (2026-08-20). Data as JSON: /api/errors/97ee42e6ca6a35ff. Report an issue: GitHub.