java.lang.NoClassDefFoundError: main/battleos/content/clanchat/ClanManager$1
    at main.battleos.content.clanchat.ClanManager.load(ClanManager.java:50)
    at main.battleos.core.Bootstrap.lambda$2(Bootstrap.java:124)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassNotFoundException: main.battleos.content.clanchat.ClanManager$1
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 5 more