What type of Python error is this, and what causes it? The output with the error is below:

Total Vehicles:  4321
Total Closings:  9
3.05s - Error collecting try..except info from source (C:\Users\micsl\source\repos\Midterm02\Bridge Monitor\mainPackage\main.py)
Traceback (most recent call last):
  File "c:\program files\microsoft visual studio\2022\community\common7\ide\extensions\microsoft\python\core\debugpy\_vendored\pydevd\pydevd.py", line 737, in collect_try_except_info
    if line > max_line:
       ^^^^^^^^^^^^^^^
TypeError: '>' not supported between instances of 'NoneType' and 'int' **

Below is my main.py:

from bridgePackage.bridge import *

if __name__ == "__main__":
    close_count = 0
    total_count = 0 

    start_count = BridgeMonitor()
    for i in range(100):
        try: 
            vehicle_count = start_count.getVehicleCount()
        except Exception as e:
            pass
            close_count += 1
        else:
            total_count += vehicle_count

    print("Total Vehicles: ", total_count)
    print("Total Closings: ", close_count)

bridge.py:

import random


class BridgeMonitor():
    def __init__(self):
        pass
    
    def getVehicleCount(self):
        if random.randint(100, 200) % 10 == 0:
            raise Exception("Bridge is closed")
        return random.randint(0, 100)