How to fix encoding error in python 3.8.6 flask?

Question

Python

When I first started using and learning flask, everything was fine, until at one point, every time I ran any script using flask, I started getting the same error:
* Serving Flask app 'main' (lazy loading)
* Environment: production
WARNING: This is a development server. Do not use it in a production deployment.
Use a production WSGI server instead.
* Debug mode: on
* Restarting with stat
* Debugger is active!
* Debugger PIN: 126-879-197
Exception in thread Thread-1:
Traceback (most recent call last):
File "C:\Users\Admin\AppData\Local\Programs\Python\Python38-32\lib\threading.py ", line 932, in _bootstrap_inner
self.run()
File "C:\Users\Admin\AppData\Local\Programs\Python\Python38-32\lib\threading.py", line 870, in run
self._target(*self._args, **self._kwargs)
File " C:\Users\Admin\PycharmProjects\pythonProject4\venv\lib\site-packages\werkzeug\serving.py", line 957, in inner
srv = make_server(
File "C:\Users\Admin\PycharmProjects\pythonProject4\venv\ lib\site-packages\werkzeug\serving.py", line 789, in make_server
return ThreadedWSGIServer(
File "C:\Users\Admin\PycharmProjects\pythonProject4\venv\lib\site-packages\werkzeug\serving.py", line 693, in __init__
super().__init__(server_address, handler) # type: ignore
File "C:\Users\Admin\AppData\Local\Programs\Python\Python38-32\lib\socketserver.py",line 452, in __init__
self.server_bind()
File "C:\Users\Admin\AppData\Local\Programs\Python\Python38-32\lib\http\server.py", line 140, in server_bind
self.server_name = socket.getfqdn(host)
File "C:\Users\Admin\AppData\Local\Programs\Python\Python38-32\lib\socket.py", line 755, in getfqdn
hostname, aliases, ipaddrs = gethostbyaddr(name)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xca in position 0: invalid continuation byte
.
What I just didn’t try: I reinstalled flask and python, changed the encodings of the script, as well as the same socket.py file. Nothing helped!
PLEASE HELP!