[17:13:56 INFO]: ggggrrrraaaannnn issued server command: /redeem slimey
[17:13:56 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'redeem' in plugin TCGMCAU v1.8.3-b49
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot.jar:git-Spigot-1387]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:180) ~[spigot.jar:git-Spigot-1387]
        at org.bukkit.craftbukkit.v1_7_R2.CraftServer.dispatchCommand(CraftServer.java:719) ~[spigot.jar:git-Spigot-1387]
        at net.minecraft.server.v1_7_R2.PlayerConnection.handleCommand(PlayerConnection.java:984) [spigot.jar:git-Spigot-1387]
        at net.minecraft.server.v1_7_R2.PlayerConnection.a(PlayerConnection.java:829) [spigot.jar:git-Spigot-1387]
        at net.minecraft.server.v1_7_R2.PacketPlayInChat.a(PacketPlayInChat.java:28) [spigot.jar:git-Spigot-1387]
        at net.minecraft.server.v1_7_R2.PacketPlayInChat.handle(PacketPlayInChat.java:65) [spigot.jar:git-Spigot-1387]
        at net.minecraft.server.v1_7_R2.NetworkManager.a(NetworkManager.java:148) [spigot.jar:git-Spigot-1387]
        at net.minecraft.server.v1_7_R2.ServerConnection.c(ServerConnection.java:77) [spigot.jar:git-Spigot-1387]
        at net.minecraft.server.v1_7_R2.MinecraftServer.v(MinecraftServer.java:705) [spigot.jar:git-Spigot-1387]
        at net.minecraft.server.v1_7_R2.DedicatedServer.v(DedicatedServer.java:273) [spigot.jar:git-Spigot-1387]
        at net.minecraft.server.v1_7_R2.MinecraftServer.u(MinecraftServer.java:568) [spigot.jar:git-Spigot-1387]
        at net.minecraft.server.v1_7_R2.MinecraftServer.run(MinecraftServer.java:474) [spigot.jar:git-Spigot-1387]
        at net.minecraft.server.v1_7_R2.ThreadServerApplication.run(SourceFile:618) [spigot.jar:git-Spigot-1387]
Caused by: java.lang.IllegalArgumentException: effect type cannot be null
        at org.apache.commons.lang.Validate.notNull(Validate.java:192) ~[spigot.jar:git-Spigot-1387]
        at org.bukkit.potion.PotionEffect.<init>(PotionEffect.java:40) ~[spigot.jar:git-Spigot-1387]
        at com.ullarah.tcgmcau.ability.aPotion.givePotion(aPotion.java:33) ~[?:?]
        at com.ullarah.tcgmcau.command.cAbility.runAbility(cAbility.java:58) ~[?:?]
        at com.ullarah.tcgmcau.command.cAbility.jsonAbility(cAbility.java:33) ~[?:?]
        at com.ullarah.tcgmcau.command.cRedeem.runValidCard(cRedeem.java:153) ~[?:?]
        at com.ullarah.tcgmcau.command.cRedeem.runRedeemCard(cRedeem.java:43) ~[?:?]
        at com.ullarah.tcgmcau.mCommands.onCommand(mCommands.java:30) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot.jar:git-Spigot-1387]
        ... 13 more