You have java 11 installed.
JabRef requires java 8:
http://help.jabref.org/en/FAQlinux
The current 5.x development version is also avaiable as snap. However, the snap version does not work with libre office
Regards
Christoph
You have java 11 installed.
JabRef requires java 8:
http://help.jabref.org/en/FAQlinux
The current 5.x development version is also avaiable as snap. However, the snap version does not work with libre office
Regards
Christoph