"Can't connect to MySQL server on 'host.minikube.internal' (115)" on ubuntu

I'm trying to connect to a MySQL database running locally from inside minikube, and I keep getting this error. I'm working on Ubuntu, in principle setting up the host to host.minikube.internal and the port to 3306 should work, but I keep getting the following error.

[2022-12-07 08:46:37,858] ERROR in app: Exception on /login [POST]
开发者_JS百科Traceback (most recent call last):
  File "/usr/local/lib/python3.10/site-packages/flask/app.py", line 2525, in wsgi_app
    response = self.full_dispatch_request()
  File "/usr/local/lib/python3.10/site-packages/flask/app.py", line 1822, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/usr/local/lib/python3.10/site-packages/flask/app.py", line 1820, in full_dispatch_request
    rv = self.dispatch_request()
  File "/usr/local/lib/python3.10/site-packages/flask/app.py", line 1796, in dispatch_request
    return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
  File "/app/server.py", line 38, in login
    cur = mysql.connection.cursor()
  File "/usr/local/lib/python3.10/site-packages/flask_mysqldb/__init__.py", line 101, in connection
    ctx.mysql_db = self.connect
  File "/usr/local/lib/python3.10/site-packages/flask_mysqldb/__init__.py", line 88, in connect
    return MySQLdb.connect(**kwargs)
  File "/usr/local/lib/python3.10/site-packages/MySQLdb/__init__.py", line 123, in Connect
    return Connection(*args, **kwargs)
  File "/usr/local/lib/python3.10/site-packages/MySQLdb/connections.py", line 185, in __init__
    super().__init__(*args, **kwargs2)
MySQLdb.OperationalError: (2002, "Can't connect to MySQL server on 'host.minikube.internal' (115)")
172.17.0.4 - - [07/Dec/2022 08:46:37] "POST /login HTTP/1.1" 500 -