Hey guys, I am to move to level 3. Please help me to unlock the contents. I will definitely help the community!

Hi guys, I am short of 5 to move to level 3. Please help me to unlock the contents.

Recently I got into the world of development of applications for a personal business, the thing is that I'm quite good with the backend but I am a complete rookie in front end and development of graphic interfaces. I wondered what would recommend me to develop interfaces, preferably something I can use with Python and be multiplatform. I have been testing some Python libraries to create interfaces, but in general they make the interface look like a software of the 90s or very simple, I would like something that would allow me to create more beautiful interfaces, regardless of learning difficulty. I would like to read your recommendations in the comments 💬.

Can anyone help me resolve the Jupyter notebook mine is showing dead while opening. It showing error :- " Traceback (most recent call last):File "", line 198, in _run_module_as_mainFile "", line 88, in _run_codeFile "C:\Users\91977\anaconda3\Scripts\jupyter-lab.EXE\__main__.py", line 4, in File "C:\Users\91977\anaconda3\Lib\site-packages\jupyterlab\__init__.py", line 8, in from .handlers.announcements import (File "C:\Users\91977\anaconda3\Lib\site-packages\jupyterlab\handlers\announcements.py", line 15, in from jupyterlab_server.translation_utils import translatorFile "C:\Users\91977\anaconda3\Lib\site-packages\jupyterlab_server\__init__.py", line 6, in from .app import LabServerAppFile "C:\Users\91977\anaconda3\Lib\site-packages\jupyterlab_server\app.py", line 10, in from jupyter_server.extension.application import ExtensionApp, ExtensionAppJinjaMixinFile "C:\Users\91977\anaconda3\Lib\site-packages\jupyter_server\extension\application.py", line 17, in from jupyter_server.serverapp import ServerAppFile "C:\Users\91977\anaconda3\Lib\site-packages\jupyter_server\serverapp.py", line 40, in from jupyter_events.logger import EventLoggerFile "C:\Users\91977\anaconda3\Lib\site-packages\jupyter_events\__init__.py", line 3, in from .logger import EVENTS_METADATA_VERSION, EventLoggerFile "C:\Users\91977\anaconda3\Lib\site-packages\jupyter_events\logger.py", line 27, in if parse(version_info) >= parse("3.1.0"):^^^^^^^^^^^^^^^^^^^File "C:\Users\91977\anaconda3\Lib\site-packages\packaging\version.py", line 56, in parsereturn Version(version)^^^^^^^^^^^^^^^^File "C:\Users\91977\anaconda3\Lib\site-packages\packaging\version.py", line 200, in __init__match = self._regex.search(version)^^^^^^^^^^^^^^^^^^^^^^^^^^^TypeError: expected string or bytes-like object, got 'NoneType'"

I am new to data science, machine learning and artificial intelligence. I know some of the basics of Python (variables, strings, integers, thats basically it). I would appreciate some tutorials/resources that I could use to learn these topics (ML, AI, Data Science and Python). Cheers!