runtime error

2023-07-08 05:07:04.108 INFO matplotlib.font_manager: generated new fontManager Traceback (most recent call last): File "/home/user/.pyenv/versions/3.8.9/bin/streamlit", line 5, in <module> from streamlit.web.cli import main File "/home/user/.pyenv/versions/3.8.9/lib/python3.8/site-packages/streamlit/__init__.py", line 55, in <module> from streamlit.delta_generator import DeltaGenerator as _DeltaGenerator File "/home/user/.pyenv/versions/3.8.9/lib/python3.8/site-packages/streamlit/delta_generator.py", line 43, in <module> from streamlit.elements.arrow_altair import ArrowAltairMixin File "/home/user/.pyenv/versions/3.8.9/lib/python3.8/site-packages/streamlit/elements/arrow_altair.py", line 36, in <module> from altair.vegalite.v4.api import Chart ModuleNotFoundError: No module named 'altair.vegalite.v4'

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