Debug with VSCode

[9a4gl]

I am adding mqtt client + socketio capability to my flask application, it works fine if I start app from command line, but I try to debug from VSCode I am getting:

Traceback (most recent call last):
  File "d:\GITWORK\tihomir.solar\venv\lib\site-packages\eventlet\hubs\hub.py", line 476, in fire_timers
    timer()
  File "d:\GITWORK\tihomir.solar\venv\lib\site-packages\eventlet\hubs\timer.py", line 59, in __call__
    cb(*args, **kw)
  File "d:\GITWORK\tihomir.solar\venv\lib\site-packages\eventlet\semaphore.py", line 152, in _do_acquire
    waiter.switch()
greenlet.error: cannot switch to a different thread

I have use_reloader=False, and in launch.json I have "--no-reload" in args.

Is it possible to debug code using flask-mqtt ?