请问这是什么原因？

Error: THREE.GLTFLoader: Unsupported asset. glTF versions >=2.0 are supported. Use LegacyGLTFLoader instead.

    at GLTFLoader.parse (gltf-loader.js? [sm]:177)

    at Object.onLoad (gltf-loader.js? [sm]:84)

    at a.<anonymous> ...