An illegal reflective access operation has occurre

I was learning to use xlxs package and received this warning:

WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.apache.poi.util.SAXHelper (file:/Library/Frameworks/R.framework/Versions/4.1/Resources/library/xlsxjars/java/poi-ooxml-3.10.1-20140818.jar) to constructor
WARNING: Please consider reporting this to the maintainers of org.apache.poi.util.SAXHelper
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release

The xlxs package that appears to be using org.apache.poi.util.SAXHelper, no idea what to do.

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