Hello!
I get this in my console how do I solve it?

14:24:55 [WARNING] [FamilyJewels] Task #112000 for FamilyJewels v2.0.3 generated an exception
14:24:55 java.lang.NoClassDefFoundError: org/bukkit/craftbukkit/entity/CraftPlayer
14:24:55 at com.minecarts.familyjewels.FamilyJewels.hookNSH(FamilyJewels.java:56)
14:24:55 at com.minecarts.familyjewels.listener.PlayerListener$1.run(PlayerListener.java:25)
14:24:55 at org.bukkit.craftbukkit.v1_6_R3.scheduler.CraftTask.run(CraftTask.java:53)
14:24:55 at org.bukkit.craftbukkit.v1_6_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:345)
14:24:55 at net.minecraft.server.v1_6_R3.MinecraftServer.t(MinecraftServer.java:524)
14:24:55 at net.minecraft.server.v1_6_R3.DedicatedServer.t(DedicatedServer.java:227)
14:24:55 at net.minecraft.server.v1_6_R3.MinecraftServer.s(MinecraftServer.java:488)
14:24:55 at net.minecraft.server.v1_6_R3.MinecraftServer.run(MinecraftServer.java:421)
14:24:55 at net.minecraft.server.v1_6_R3.ThreadServerApplication.run(SourceFile:583)

Unfortunately FamilyJewels hasn't been updated in some time so the error you're getting is a result of that.

There is a more up to date fork of the plugin here: https://github.com/nightpool/Rejewled ... however I'm not sure if there are any compiled versions of it -- good luck!