visiallization problem

[Steven0928]

python occdepth/scripts/visualization/kitti_vis_pred.py +file=/home/robotlab/reserch/Kittirelated/shared_dir/OccDepth-main/output/kitti/08/000000.pkl +dataset=kitti
Traceback (most recent call last):
  File "/home/robotlab/anaconda3/envs/occdepth/lib/python3.7/site-packages/importlib_metadata/__init__.py", line 292, in __getitem__
    return next(iter(self.select(name=name)))
StopIteration

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "occdepth/scripts/visualization/kitti_vis_pred.py", line 6, in <module>
    from mayavi import mlab
  File "/home/robotlab/anaconda3/envs/occdepth/lib/python3.7/site-packages/mayavi/mlab.py", line 15, in <module>
    from mayavi.core.common import process_ui_events
  File "/home/robotlab/anaconda3/envs/occdepth/lib/python3.7/site-packages/mayavi/core/common.py", line 21, in <module>
    from pyface import api as pyface
  File "/home/robotlab/anaconda3/envs/occdepth/lib/python3.7/site-packages/pyface/api.py", line 13, in <module>
    from .about_dialog import AboutDialog
  File "/home/robotlab/anaconda3/envs/occdepth/lib/python3.7/site-packages/pyface/about_dialog.py", line 15, in <module>
    from .toolkit import toolkit_object
  File "/home/robotlab/anaconda3/envs/occdepth/lib/python3.7/site-packages/pyface/toolkit.py", line 23, in <module>
    toolkit = toolkit_object = find_toolkit("pyface.toolkits")
  File "/home/robotlab/anaconda3/envs/occdepth/lib/python3.7/site-packages/pyface/base_toolkit.py", line 282, in find_toolkit
    return import_toolkit(ETSConfig.toolkit, entry_point)
  File "/home/robotlab/anaconda3/envs/occdepth/lib/python3.7/site-packages/pyface/base_toolkit.py", line 216, in import_toolkit
    entry_point_group = importlib_metadata.entry_points()[entry_point]
  File "/home/robotlab/anaconda3/envs/occdepth/lib/python3.7/site-packages/importlib_metadata/__init__.py", line 294, in __getitem__
    raise KeyError(name)
KeyError: 'pyface.toolkits

Is it a Qt problem?
How can I solve it ?
Thanks a lot