Error #1

13:38:42 INFO]: Altersbegrenzung issued server command: /start
[13:38:49 WARN]: [CopsAndRobbers] Task #11 for CopsAndRobbers v2.0 generated an exception
java.lang.NullPointerException
        at net.devoloution.game.profile.Profile.<init>(Profile.java:52) ~[?:?]
        at net.devoloution.game.CopsAndRobbers.getProfile(CopsAndRobbers.java:155) ~[?:?]
        at net.devoloution.game.gamestates.GameStatePreparing.selectCopByVotes(GameStatePreparing.java:190) ~[?:?]
        at net.devoloution.game.gamestates.GameStatePreparing.onStart(GameStatePreparing.java:64) ~[?:?]
        at net.devoloution.engine.state.GameStateManager.next(GameStateManager.java:43) ~[?:?]
        at net.devoloution.game.gamestates.GameStateLobby.run(GameStateLobby.java:116) ~[?:?]
        at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:71) ~[spigot_server.jar:git-Spigot-d2856ae-8f0f4ed]
        at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:350) [spigot_server.jar:git-Spigot-d2856ae-8f0f4ed]
        at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:726) [spigot_server.jar:git-Spigot-d2856ae-8f0f4ed]
        at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:367) [spigot_server.jar:git-Spigot-d2856ae-8f0f4ed]
        at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:657) [spigot_server.jar:git-Spigot-d2856ae-8f0f4ed]
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:560) [spigot_server.jar:git-Spigot-d2856ae-8f0f4ed]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_74]