Posted by gouessej on Nov 06, 2021; 8:36pm
URL: https://forum.jogamp.org/getAWTgraphicsconfiguration-causes-NPE-error-tp4041439p4041452.html

There is no extension mechanism in your version of Java, it was removed in Java 9 (no extdir property as a consequence). Check that you didn't put JARs into your JRE too.