Cannot read property 'matrixWorld' of undefined

no

getBoxEdges(box) {
      const offset = this.cloud.offset
      const geometry = box.geometry
      const ltw = box.localToWorld
      const coors = geometry.vertices.map(xyz => {
        const world = ltw(xyz)
        return [world.x + offset[0], world.y + offset[1], world.z + offset[2]]
      })
      return coors
    }

yes

getBoxEdges(box) {
      const offset = this.cloud.offset
      const geometry = box.geometry
      const coors = geometry.vertices.map(xyz => {
        const world = box.localToWorld(xyz)
        return [world.x + offset[0], world.y + offset[1], world.z + offset[2]]
      })
      return coors
    }