Could not pass event GroupMessageEvent to XinxinBotInfo v1.0.0-SNAPSHOT
org.bukkit.event.EventException: null
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot-1.12.2.jar:git-Spigot-4bd94dc-f4ca180]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot-1.12.2.jar:git-Spigot-4bd94dc-f4ca180]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:500) [spigot-1.12.2.jar:git-Spigot-4bd94dc-f4ca180]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:485) [spigot-1.12.2.jar:git-Spigot-4bd94dc-f4ca180]
at com.xinxin.XinxinBot.XinxinJson.<init>(XinxinJson.java:68) [XinxinBotApi-1.0.0-SNAPSHOT.jar:?]
at com.xinxin.XinxinBot.WebSocket$1.onMessage(WebSocket.java:25) [XinxinBotApi-1.0.0-SNAPSHOT.jar:?]
at org.java_websocket.client.WebSocketClient.onWebsocketMessage(WebSocketClient.java:462) [XinxinBotApi-1.0.0-SNAPSHOT.jar:?]
at org.java_websocket.drafts.Draft_6455.processFrame(Draft_6455.java:696) [XinxinBotApi-1.0.0-SNAPSHOT.jar:?]
at org.java_websocket.WebSocketImpl.decodeFrames(WebSocketImpl.java:367) [XinxinBotApi-1.0.0-SNAPSHOT.jar:?]
at org.java_websocket.WebSocketImpl.decode(WebSocketImpl.java:212) [XinxinBotApi-1.0.0-SNAPSHOT.jar:?]
at org.java_websocket.client.WebSocketClient.run(WebSocketClient.java:389) [XinxinBotApi-1.0.0-SNAPSHOT.jar:?]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_251]
Caused by: java.lang.IllegalArgumentException: Name cannot be null
at org.apache.commons.lang.Validate.notNull(Validate.java:192) ~[spigot-1.12.2.jar:git-Spigot-4bd94dc-f4ca180]
at org.bukkit.craftbukkit.v1_12_R1.CraftServer.getOfflinePlayer(CraftServer.java:1292) ~[spigot-1.12.2.jar:git-Spigot-4bd94dc-f4ca180]
at org.bukkit.Bukkit.getOfflinePlayer(Bukkit.java:714) ~[spigot-1.12.2.jar:git-Spigot-4bd94dc-f4ca180]
at com.xinxin.XinxinBotInfo.Xinxin_Listener.GroupMessageEvent(Xinxin_Listener.java:35) ~[?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_251]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_251]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_251]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_251]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[spigot-1.12.2.jar:git-Spigot-4bd94dc-f4ca180]
... 11 more