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jdeveloper install problem

Very much a newbie. I have no experience with jdeveloper since I cannot get it installed. My machine is a mid-2015 MacBook Pro running Catalina. The first warning reported when attempting an install is "An illegal reflective access operation has occurred". I enclose a file which gives much more information of what is happening.

I do have both the .jar files in the same folder.

This is my first post/question - if selecting a category is compulsory then apologies if I choose the wrong one.