Aar0n 我改用 animator 动画 报如下错误，这个是导出哪里需要设置吗，run的时候也是这个错误，实在不知道是什么原因
laya.d3.js:18192 Uncaught TypeError: Cannot read property '0' of undefined
at Function.Utils3D._mulMatrixArray (laya.d3.js:18192)
at SkinnedMeshRender.__proto._renderUpdate (laya.d3.js:37732)
at Function.FrustumCulling.renderObjectCulling (laya.d3.js:6487)
at Scene.__proto._preRenderScene (laya.d3.js:29274)
at Camera.__proto._renderCamera (laya.d3.js:39685)
at Scene.__proto.renderSubmit (laya.d3.js:29827)
at WebGLContext2D.__proto.submitElement (laya.webgl.js:5915)
at WebGLContext2D.__proto.flush (laya.webgl.js:5937)
at RenderContext.__proto.flush (laya.core.js:5982)
at Stage.__proto.render (laya.core.js:18593)
Utils3D._mulMatrixArray @ laya.d3.js:18192
__proto._renderUpdate @ laya.d3.js:37732
FrustumCulling.renderObjectCulling @ laya.d3.js:6487
__proto._preRenderScene @ laya.d3.js:29274
__proto._renderCamera @ laya.d3.js:39685
__proto.renderSubmit @ laya.d3.js:29827
__proto.submitElement @ laya.webgl.js:5915
__proto.flush @ laya.webgl.js:5937
__proto.flush @ laya.core.js:5982
__proto.render @ laya.core.js:18593
__proto._loop @ laya.core.js:18519
