[10:25:28] [Server thread/ERROR] [Sponge]: Error occurred while executing command 'experm list groups owner' for source DedicatedServer: null
java.lang.NullPointerException
        at com.gmail.edziu1996.extrapermissions.api.EPPlayer.getGroupName(EPPlayer.java:341) ~[EPPlayer.class:?]
        at com.gmail.edziu1996.extrapermissions.core.cmd.CmdExtraPermExecutor.cmdList(CmdExtraPermExecutor.java:774) ~[CmdExtraPermExecutor.class:?]
        at com.gmail.edziu1996.extrapermissions.core.cmd.CmdExtraPermExecutor.execute(CmdExtraPermExecutor.java:101) ~[CmdExtraPermExecutor.class:?]
        at org.spongepowered.api.command.spec.CommandSpec.process(CommandSpec.java:351) ~[CommandSpec.class:1.10.2-2221-5.1.0-BETA-2128]
        at org.spongepowered.api.command.dispatcher.SimpleDispatcher.process(SimpleDispatcher.java:333) ~[SimpleDispatcher.class:1.10.2-2221-5.1.0-BETA-2128]
        at org.spongepowered.common.command.SpongeCommandManager.process(SpongeCommandManager.java:295) [SpongeCommandManager.class:1.10.2-2221-5.1.0-BETA-2128]
        at net.minecraft.command.ServerCommandManager.func_71556_a(SourceFile:1083) [bd.class:?]
        at net.minecraft.server.dedicated.DedicatedServer.func_71333_ah(DedicatedServer.java:423) [ld.class:?]
        at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:388) [ld.class:?]
        at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:613) [MinecraftServer.class:?]
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:471) [MinecraftServer.class:?]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_102]