Could not pass incoming plugin message to PlayerServers v1.15.5-b1035
28.01 13:00:37 [Server] INFO java.lang.IllegalArgumentException: Invalid UUID string: null
28.01 13:00:37 [Server] INFO at java.util.UUID.fromString(UUID.java:194) ~[?:1.7.0_60]
28.01 13:00:37 [Server] INFO at net.cakemine.playerservers.bukkit.gui.ServersGUI.open(ServersGUI.java:144) ~[?:?]
28.01 13:00:37 [Server] INFO at net.cakemine.playerservers.bukkit.sync.PluginListener.onPluginMessageReceived(PluginListener.java:213) ~[?:?]
28.01 13:00:37 [Server] INFO at org.bukkit.plugin.messaging.StandardMessenger.dispatchIncomingMessage(StandardMessenger.java:427) [spigot-1.8.8.jar:git-Spigot-76236cb-c373061]
28.01 13:00:37 [Server] INFO at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:2113) [spigot-1.8.8.jar:git-Spigot-76236cb-c373061]
28.01 13:00:37 [Server] INFO at net.minecraft.server.v1_8_R3.PacketPlayInCustomPayload.a(SourceFile:55) [spigot-1.8.8.jar:git-Spigot-76236cb-c373061]
28.01 13:00:37 [Server] INFO at net.minecraft.server.v1_8_R3.PacketPlayInCustomPayload.a(SourceFile:8) [spigot-1.8.8.jar:git-Spigot-76236cb-c373061]
28.01 13:00:37 [Server] INFO at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [spigot-1.8.8.jar:git-Spigot-76236cb-c373061]
28.01 13:00:37 [Server] INFO at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [?:1.7.0_60]
28.01 13:00:37 [Server] INFO at java.util.concurrent.FutureTask.run(FutureTask.java:262) [?:1.7.0_60]
28.01 13:00:37 [Server] INFO at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44) [spigot-1.8.8.jar:git-Spigot-76236cb-c373061]
28.01 13:00:37 [Server] INFO at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:715) [spigot-1.8.8.jar:git-Spigot-76236cb-c373061]
28.01 13:00:37 [Server] INFO at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [spigot-1.8.8.jar:git-Spigot-76236cb-c373061]
28.01 13:00:37 [Server] INFO at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654) [spigot-1.8.8.jar:git-Spigot-76236cb-c373061]
28.01 13:00:37 [Server] INFO at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557) [spigot-1.8.8.jar:git-Spigot-76236cb-c373061]
28.01 13:00:37 [Server] INFO at java.lang.Thread.run(Thread.java:745) [?:1.7.0_60]