can't see point cloud on labelCloud when open and showing GUI...

[Know-Lee]

Describe the bug
can't see point cloud on labelCloud when open and showing GUI...

[Know-Lee]

Showing GUI...
Traceback (most recent call last):
File "/home/lee/PyProjects/labelCloud/labelCloud/control/controller.py", line 60, in loop_gui
self.set_selected_side()
File "/home/lee/PyProjects/labelCloud/labelCloud/control/controller.py", line 129, in set_selected_side
_, self.selected_side = oglhelper.get_intersected_sides(
File "/home/lee/PyProjects/labelCloud/labelCloud/utils/oglhelper.py", line 178, in get_intersected_sides
p0, p1 = get_pick_ray(x, y, modelview, projection) # Calculate picking ray
File "/home/lee/PyProjects/labelCloud/labelCloud/utils/oglhelper.py", line 132, in get_pick_ray
p_front = GLU.gluUnProject(x, real_y, 0, modelview, projection, viewport)
File "src/latebind.pyx", line 51, in OpenGL_accelerate.latebind.Curry.call
File "/home/lee/miniconda3/envs/labelCloud/lib/python3.8/site-packages/OpenGL/GLU/projection.py", line 61, in gluUnProject
raise ValueError( """Projection failed!""" )
ValueError: Projection failed!
Aborted (core dumped)