internel server error /webhook

[najeeb2113]

Any solutions newbie here . followed the documentation ended up here.

1. downloaded module
2. open as pycharm project
3. done webhook setup
4. settings.py added accesstoken verify token
5. developers facebook page added callback url ngrok lin/webhook . with same verify token when ever i send message to the bot on facebook getting this error in my terminal.

resolutions will be appreciated . when get request on http://0bfd5c1a35fb.ngrok.io/webhook i get multi value dict key error error log: [12/Jan/2021 19:52:03] "POST /webhook HTTP/1.1" 500 82026 Internal Server Error: /webhook Traceback (most recent call last): File "/home/najeeb/.local/lib/python3.5/site-packages/django/core/handlers/exception.py", line 34, in inner response = get_response(request) File "/home/najeeb/.local/lib/python3.5/site-packages/django/core/handlers/base.py", line 115, in _get_response response = self.process_exception_by_middleware(e, request) File "/home/najeeb/.local/lib/python3.5/site-packages/django/core/handlers/base.py", line 113, in _get_response response = wrapped_callback(request, *callback_args, **callback_kwargs) File "/home/najeeb/.local/lib/python3.5/site-packages/django/views/decorators/csrf.py", line 54, in wrapped_view return view_func(*args, **kwargs) File "/home/najeeb/facebookbot/FacebookMessengerBot-master/bot/views.py", line 114, in web_hook return chat_handler(request) File "/home/najeeb/facebookbot/FacebookMessengerBot-master/bot/views.py", line 95, in chat_handler data = json.loads(request.body) File "/usr/lib/python3.5/json/init.py", line 312, in loads s.class.name)) TypeError: the JSON object must be str, not 'bytes'