I have a problem installing. Based on the logs, seems that the link to download the targz is broken.

True enough, tested on browser, this file does not exist
https://download.java.net/java/GA/jdk12.0.1/69cfe15208a647278a19ef0990eea691/12/GPL/openjdk-12.0.1_linux-x64_bin.tar.gz

cat install-java ...