Jupyter notebook connects and disconnects to kernel

After installing jupyter in Ubuntu 18.04, the notebook would get stuck with the message "connecting to kernel", but never actually connecting. After following some StackOverflow advice, I downgraded tornado to a lower version than 6, which solved the problem for many users. Now my notebook connects and disconnects right afterward, and then connects again to disconnect right after. I updated and upgraded every package and the browser (I'm using chrome, but the other browsers gave the same issue).

cohen@Surface:~$ jupyter notebook[I 18:18:10.561 NotebookApp] Serving notebooks from local directory: /home/cohen[I 18:18:10.562 NotebookApp] 0 active kernels[I 18:18:10.562 NotebookApp] The Jupyter Notebook is running at:[I 18:18:10.563 NotebookApp] http://localhost:8888/?token=86055fa9a8912f1da959db9ad89697d1dbbafc13aa2a3410[I 18:18:10.563 NotebookApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).[C 18:18:10.577 NotebookApp]    Copy/paste this URL into your browser when you connect for the first time,    to login with a token:        http://localhost:8888/?token=86055fa9a8912f1da959db9ad89697d1dbbafc13aa2a3410[I 18:18:11.986 NotebookApp] Accepting one-time-token-authenticated connection from 127.0.0.1[W 18:18:12.770 NotebookApp] 404 GET /static/components/moment/locale/es-es.js?v=20220525181809 (127.0.0.1) 7.36ms referer=http://localhost:8888/tree/usr/lib/python3.6/json/encoder.py:257: UserWarning: date_default is deprecated since jupyter_client 7.0.0. Use jupyter_client.jsonutil.json_default.  return _iterencode(o, 0)[I 18:18:28.175 NotebookApp] 302 GET /tree (127.0.0.1) 0.93ms[I 18:18:39.490 NotebookApp] 302 GET /?token=86055fa9a8912f1da959db9ad89697d1dbbafc13aa2a3410 (127.0.0.1) 0.76ms[I 18:18:44.078 NotebookApp] Kernel started: 44f28b4c-ecbd-4cfa-b88d-1504b55bebd3[E 18:18:45.238 NotebookApp] Uncaught exception GET /api/kernels/44f28b4c-ecbd-4cfa-b88d-1504b55bebd3/channels?session_id=0E453CCA133540FEB36DE62324C09F20 (127.0.0.1)    HTTPServerRequest(protocol='http', host='localhost:8888', method='GET', uri='/api/kernels/44f28b4c-ecbd-4cfa-b88d-1504b55bebd3/channels?session_id=0E453CCA133540FEB36DE62324C09F20', version='HTTP/1.1', remote_ip='127.0.0.1')    Traceback (most recent call last):      File "/home/cohen/.local/lib/python3.6/site-packages/tornado/websocket.py", line 546, in _run_callback        result = callback(*args, **kwargs)      File "/usr/lib/python3/dist-packages/notebook/services/kernels/handlers.py", line 258, in open        super(ZMQChannelsHandler, self).open()      File "/usr/lib/python3/dist-packages/notebook/base/zmqhandlers.py", line 168, in open        self.send_ping, self.ping_interval, io_loop=loop,    TypeError: __init__() got an unexpected keyword argument 'io_loop'[E 18:18:46.583 NotebookApp] Uncaught exception GET /api/kernels/44f28b4c-ecbd-4cfa-b88d-1504b55bebd3/channels?session_id=0E453CCA133540FEB36DE62324C09F20 (127.0.0.1)    HTTPServerRequest(protocol='http', host='localhost:8888', method='GET', uri='/api/kernels/44f28b4c-ecbd-4cfa-b88d-1504b55bebd3/channels?session_id=0E453CCA133540FEB36DE62324C09F20', version='HTTP/1.1', remote_ip='127.0.0.1')    Traceback (most recent call last):      File "/home/cohen/.local/lib/python3.6/site-packages/tornado/websocket.py", line 546, in _run_callback        result = callback(*args, **kwargs)      File "/usr/lib/python3/dist-packages/notebook/services/kernels/handlers.py", line 258, in open        super(ZMQChannelsHandler, self).open()      File "/usr/lib/python3/dist-packages/notebook/base/zmqhandlers.py", line 168, in open        self.send_ping, self.ping_interval, io_loop=loop,    TypeError: __init__() got an unexpected keyword argument 'io_loop'[E 18:18:47.943 NotebookApp] Uncaught exception GET /api/kernels/44f28b4c-ecbd-4cfa-b88d-1504b55bebd3/channels?session_id=0E453CCA133540FEB36DE62324C09F20 (127.0.0.1)    HTTPServerRequest(protocol='http', host='localhost:8888', method='GET', uri='/api/kernels/44f28b4c-ecbd-4cfa-b88d-1504b55bebd3/channels?session_id=0E453CCA133540FEB36DE62324C09F20', version='HTTP/1.1', remote_ip='127.0.0.1')    Traceback (most recent call last):      File "/home/cohen/.local/lib/python3.6/site-packages/tornado/websocket.py", line 546, in _run_callback        result = callback(*args, **kwargs)      File "/usr/lib/python3/dist-packages/notebook/services/kernels/handlers.py", line 258, in open        super(ZMQChannelsHandler, self).open()      File "/usr/lib/python3/dist-packages/notebook/base/zmqhandlers.py", line 168, in open        self.send_ping, self.ping_interval, io_loop=loop,    TypeError: __init__() got an unexpected keyword argument 'io_loop'

Thanks in advance!