The first five questions at level 11 don't run, but throw ClassNotFoundException. The answer must be correct, because they run with Netbeans 11. Please help, otherwise I have to finish my studies at codegym. Many thanks, in advice myqms User myqms myqms 3 hours ago Next question. The same problem: Caused by: java.lang.ClassNotFoundException: de.codegym.task.task11.task1106.Solution at at java.lang.ClassLoader.loadClass( at java.lang.ClassLoader.loadClass( ... 3 more