Error in "01_kitti_ds_vis.ipynb --> Average Transformation of the Kitti Dataset"

[rginjapan]

TypeError Traceback (most recent call last)
in ()
37 print(drive)
38
---> 39 imgs, imus, gts_local = data_permuter(data)
40
41 # prepare ground truth tranlational and rotational part

TypeError: 'NoneType' object is not iterable

[rginjapan]

This error happedn when I tired to run the 01_kitti_ds_vis.ipynb (Average Transformation of the Kitti Dataset part).