This seems to come up on various Linux distros from time to time. For example: https://github.com/zaproxy/zaproxy/issues/3051 The following suggestions may let you work past the issue. Try starting ZAP from the command line instead of starting it from a shortcut (such as a Plasma/KDE button, dock icon, etc.) Try adding the following to /etc/environment: _JAVA_OPTIONS='-Dawt.useSystemAAFontSettings=on'
