Not able to start matplotlib

Tell us what’s happening:
Matplotlib created a temporary config/cache directory at /tmp/matplotlib-4jlxowm2 because the default path (/config/matplotlib) is not a writable directory; it is highly recommended to set the MPLCONFIGDIR environment variable to a writable directory, in particular to speed up the import of Matplotlib and to better support multiprocessing.

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User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.1.2 Safari/605.1.15.

Challenge: Medical Data Visualizer

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pls advise. not able to proceed. do I need to make any changes on my local machine ?