Only openJDK 8 is supported. So kindly follow the recommended instructions.
As for running the GUI on OpenSuse … good luck with that. Only Ubuntu up to 18.04 is supported. CLI should work on (almost) any distribution provided the right java version is installed.
check here for my attempts to make it work on gentoo:
@ThanhTo @duyluong which reminds me … i still have a pending question in the above report. any plans to migrate to a newest libwebkit? i didn’t abandoned my plans to make it work on other distribution than ubuntu, just wanted to know what voodoo should i approach …