runtime error

Space failed to start. Exit code: 1. Reason: Traceback (most recent call last): File "app.py", line 7, in <module> import gradio as gr File "/home/user/.local/lib/python3.8/site-packages/gradio/__init__.py", line 3, in <module> import gradio.components as components File "/home/user/.local/lib/python3.8/site-packages/gradio/components.py", line 23, in <module> import altair as alt ModuleNotFoundError: No module named 'altair'

Container logs: