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world.onPlayerJoin(async({entity}) => {
    const cs = await entity.player.dialog({
        type: 'select',
        title: `选择身份`,
        options: ['普通战士']
    })
    if(cs){
        if(cs.index === 0){
        entity.player.addWearable({
            bodyPart: Box3BodyPart.RIGHT_HAND,
            mesh: 'mesh/剑.vb',
            orientation: new Box3Quaternion(0,1,0,0).rotateY(Math.PI),
            offset: new Box3Vector3(-0.05,-0.1,0.5),
            scale: Box3Vector3 = new Box3Vector3(0.3, 0.3, 0.3),
        })
    }
}

报错：