JabRef version

Latest development branch build (please note build date below)

Operating system

GNU / Linux

Details on version and operating system

JabRef 5.4--2021-09-11--366f0cf Linux 5.4.0-84-generic amd64 Java 16.0.2 JavaFX 17+18

Checked with the latest development build

• I made a backup of my libraries before testing the latest development version.
• I have tested the latest development version and the problem persists

Steps to reproduce the behaviour

1. Open JabRef
2. left half of the display is blank, where groups/search would be if invoked.

Appendix

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