questions about: plot_causal_graph()

[bjy1995]

when I implement in the Case Study:

why=Why()
why.fit(train_data,outcome,treatment='Card_Category') 
why.plot_causal_graph()

The error dispays as :
/home/tiger/.local/lib/python3.7/site-packages/ylearn/utils/_common.py:95: UserWarning: Failed to display pydot image: [Errno 2] "fdp" not found in path.. warnings.warn(f'Failed to display pydot image: {e}.')

Any idea to solve this issue?

[bjy1995]

just solved~ by updating system, Xcode and Graphviz installed!