PiCamera issue

 main  [2022-01-07 20:24:26,054] ERROR in app: Exception on /camera/snap [GET]
 main  Traceback (most recent call last):
 main    File "/usr/local/lib/python3.6/site-packages/flask/app.py", line 2070, in wsgi_app
 main      response = self.full_dispatch_request()
 main    File "/usr/local/lib/python3.6/site-packages/flask/app.py", line 1515, in full_dispatch_request
 main      rv = self.handle_user_exception(e)
 main    File "/usr/local/lib/python3.6/site-packages/flask_cors/extension.py", line 165, in wrapped_function
 main      return cors_after_request(app.make_response(f(*args, **kwargs)))
 main    File "/usr/local/lib/python3.6/site-packages/flask/app.py", line 1513, in full_dispatch_request
 main      rv = self.dispatch_request()
 main    File "/usr/local/lib/python3.6/site-packages/flask/app.py", line 1499, in dispatch_request
 main      return self.ensure_sync(self.view_functions[rule.endpoint])(**req.view_args)
 main    File "/usr/src/app/tom/server.py", line 243, in _cam_snap
 main      raw_bytes = capture_frame(encoding="png")
 main    File "/usr/src/app/tom/camera.py", line 36, in capture_frame
 main      with PiCamera() as camera:
 main    File "/usr/lib/python3/dist-packages/picamera/camera.py", line 433, in __init__
 main      self._init_preview()
 main    File "/usr/lib/python3/dist-packages/picamera/camera.py", line 513, in _init_preview
 main      self, self._camera.outputs[self.CAMERA_PREVIEW_PORT])
 main    File "/usr/lib/python3/dist-packages/picamera/renderers.py", line 558, in __init__
 main      self.renderer.inputs[0].connect(source).enable()
 main    File "/usr/lib/python3/dist-packages/picamera/mmalobj.py", line 2212, in enable
 main      prefix="Failed to enable connection")
 main    File "/usr/lib/python3/dist-packages/picamera/exc.py", line 184, in mmal_check
 main      raise PiCameraMMALError(status, prefix)
 main  picamera.exc.PiCameraMMALError: Failed to enable connection: Out of resources