MSS Version: 9.0.1
Python Version: 3.10.11
Windows 10 22H2

Exception in thread Thread-1 (update):
Traceback (most recent call last):
File "C:threading.py", line 1016, in _bootstrap_inner
self.run()
File "C:threading.py", line 953, in run
self._target(*self._args, **self._kwargs)
File "d:PlayerHealth.py", line 29, in update
img = np.array(self.ms.grab(self.healthBox))
File "C:mss\base.py", line 90, in grab
screenshot = self._grab_impl(monitor)
File "C:mss\windows.py", line 235, in _grab_impl
srcdc, memdc = self._handles.srcdc, self._handles.memdc
AttributeError: '_thread._local' object has no attribute 'srcdc'

class PlayerHealth:

    def init(self):
        # Initialize variables
        self.ms = mss.mss()
        self.healthBox = {'top': 45, 'left': 100, 'width': 100, 'height': 20}
        self.healthPercentage = 100

    def start(self):
        # Start the thread that reads frames from the video stream
        Thread(target=self.update,args=()).start()
        return self

    def update(self):
        # Keep looping indefinitely until the thread is stopped
        while True:
            time.sleep(1)
            # Otherwise, grab the next frame from the stream
            img = Image.frombytes('RGB', (100, 20), self.ms.grab(self.healthBox).rgb)
            screen = cv2.cvtColor(np.array(img), cv2.COLOR_BGR2GRAY)

            # Save so we can see what we grabbed - Debug purpose only
            cv2.imwrite("health.png",screen)

class main:
    def testObject():
      aPlayerHealth = PlayerHealth().start()
      while True:
          time.sleep(5)
          print(aPlayerHealth.read())