Collectible Card Game Headquarters

Well I use mostly ubuntu nowadays, and for running a server I wish to use a small docker (based on alpine linux). To run xmage it is stated one needs "jre 8 or newer", however before I start buy an extra server, I wish to play using and host using the same pc.

I notice however the following remark on the git:

Caveat: There's a bug with the file chooser when OpenGL is enabled (you use the file chooser when you, for instance, try to load a deck from disk). The suggested workaround will make the game crash, so it's not an option.

If you cannot pick a deck to play it's kind of not useful to me, so what's up with this?