A error while running collect_lidar_data.py ,about the octomap-python

[ShoulinWen]

There is a error while running collect_lidar_data.py as following:
Traceback (most recent call last):
File "collect_lidar_data.py", line 48, in
occupancy_map.visualize()
File "/home/wsl/carla/CARLA_0.9.11/PythonAPI/Safe_Occlusion_Aware_Planning-main/mapping/occupancy_map.py", line 91, in visualize
occupied, _ = self.octree.extractPointCloud()
File "octomap/octomap.pyx", line 510, in octomap.OcTree.extractPointCloud
File "octomap/octomap.pyx", line 262, in iter
AttributeError: 'octomap.leaf_iterator' object has no attribute '_leaf_iterator__is_end'

I wonder if you have encountered this error before and konw how to solve it? Thanks a lot in advance!