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 java.net.URLClassLoader.findClass(URLClassLoader.java:382) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ... 3 more