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Thought I would try the latest: 2019.3.0a7. I successfully did a build with no Gradle errors!
I can relate to "going insane". Also trying just a cube, but disabling my firewall didn't help.
I followed your steps 1-4, I didn't see "Path", so I just clicked "New". It asks for a Variable Name & Variable Value, I pasted the above in for...
Similar problem, but started with clean simple Android project using 2019.1.8f1. "...Failure: Gradle initialization failed." "IOException: Win32...