Trying to get the example to run, java.lang.NoClassDefFoundError: ch/bailu/gtk/gtk/Widget

[wusspuss]

I add the library via maven/jitpack as instructed in README. It builds fine, but when running it errors out with:
/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -javaagent:/home/archie/Downloads/idea-IC-233.14015.106/lib/idea_rt.jar=34095:/home/archie/Downloads/idea-IC-233.14015.106/bin -Dfile.encoding=UTF-8 -classpath /home/archie/IdeaProjects/example-gtk/target/classes org.example.Main Error: Unable to initialize main class org.example.Main Caused by: java.lang.NoClassDefFoundError: ch/bailu/gtk/gtk/Widget

[bailuk]

The project builds when building with maven?
To me it looks like VS-Code, respectively the java-plugin your using does not load dependencies correctly. Reloading dependencies with that maven icon does not help?