2020-02-25 19:21:49.108 [main] ERROR - Throwing
cn.nukkit.utils.EventException: null
	at cn.nukkit.plugin.MethodEventExecutor.execute(MethodEventExecutor.java:34) ~[nukkit-1.0-SNAPSHOT.jar:?]
	at cn.nukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:56) ~[nukkit-1.0-SNAPSHOT.jar:?]
	at cn.nukkit.plugin.PluginManager.callEvent(PluginManager.java:546) [nukkit-1.0-SNAPSHOT.jar:?]
	at cn.nukkit.Player.close(Player.java:3564) [nukkit-1.0-SNAPSHOT.jar:?]
	at cn.nukkit.Player.close(Player.java:3550) [nukkit-1.0-SNAPSHOT.jar:?]
	at cn.nukkit.network.RakNetInterface.closeSession(RakNetInterface.java:84) [nukkit-1.0-SNAPSHOT.jar:?]
	at cn.nukkit.raknet.server.ServerHandler.handlePacket(ServerHandler.java:164) [nukkit-1.0-SNAPSHOT.jar:?]
	at cn.nukkit.network.RakNetInterface.process(RakNetInterface.java:66) [nukkit-1.0-SNAPSHOT.jar:?]
	at cn.nukkit.network.Network.processInterfaces(Network.java:83) [nukkit-1.0-SNAPSHOT.jar:?]
	at cn.nukkit.Server.tick(Server.java:1132) [nukkit-1.0-SNAPSHOT.jar:?]
	at cn.nukkit.Server.tickProcessor(Server.java:911) [nukkit-1.0-SNAPSHOT.jar:?]
	at cn.nukkit.Server.start(Server.java:888) [nukkit-1.0-SNAPSHOT.jar:?]
	at cn.nukkit.Server.<init>(Server.java:573) [nukkit-1.0-SNAPSHOT.jar:?]
	at cn.nukkit.Nukkit.main(Nukkit.java:112) [nukkit-1.0-SNAPSHOT.jar:?]
Caused by: java.lang.NullPointerException
	at zen.zchat.Utils.getGroup(Utils.java:249) ~[?:?]
	at zen.zchat.Events.onLeave(Events.java:114) ~[?:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_242]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_242]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_242]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_242]
	at cn.nukkit.plugin.MethodEventExecutor.execute(MethodEventExecutor.java:29) ~[nukkit-1.0-SNAPSHOT.jar:?]
	... 13 more