Hi! I tried out the add-on and it has the exact same problem that the last commenter talked about.
Open voxelize_v1-1.py file in blender text editor. Goto line 91 and change percent to ratio and it will work. I've tested with 2.93, 3.0, 3.1(Last weeks version), and 3.2 (Last weeks)
Original:
bpy.ops.mesh.select_random(percent=count + 1, seed=count)
New:
bpy.ops.mesh.select_random(ratio=count + 1, seed=count)