Disease 3.2.0 and previous

Without a player parameter, all commands at console throw (for example)
>disease check
[23:02:03] [Server thread/WARN]: Unexpected exception while parsing console command "disease check"
org.bukkit.command.CommandException: Unhandled exception executing command 'disease' in plugin Disease v3.2.0
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:47) ~[spigot-1.14.1.jar-2019-05-21-0728:git-Spigot-03bd4b0-342194e]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:149) ~[spigot-1.14.1.jar-2019-05-21-0728:git-Spigot-03bd4b0-342194e]
at org.bukkit.craftbukkit.v1_14_R1.CraftServer.dispatchCommand(CraftServer.java:707) ~[spigot-1.14.1.jar-2019-05-21-0728:git-Spigot-03bd4b0-342194e]
at org.bukkit.craftbukkit.v1_14_R1.CraftServer.dispatchServerCommand(CraftServer.java:692) [spigot-1.14.1.jar-2019-05-21-0728:git-Spigot-03bd4b0-342194e]
at net.minecraft.server.v1_14_R1.DedicatedServer.handleCommandQueue(DedicatedServer.java:433) [spigot-1.14.1.jar-2019-05-21-0728:git-Spigot-03bd4b0-342194e]
at net.minecraft.server.v1_14_R1.DedicatedServer.b(DedicatedServer.java:397) [spigot-1.14.1.jar-2019-05-21-0728:git-Spigot-03bd4b0-342194e]
at net.minecraft.server.v1_14_R1.MinecraftServer.a(MinecraftServer.java:956) [spigot-1.14.1.jar-2019-05-21-0728:git-Spigot-03bd4b0-342194e]
at net.minecraft.server.v1_14_R1.MinecraftServer.run(MinecraftServer.java:801) [spigot-1.14.1.jar-2019-05-21-0728:git-Spigot-03bd4b0-342194e]
at java.lang.Thread.run(Thread.java:834) [?:?]
Caused by: java.lang.ArrayIndexOutOfBoundsException: Index 1 out of bounds for length 1
at com.hmmcrunchy.disease.Disease.onCommand(Disease.java:2489) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[spigot-1.14.1.jar-2019-05-21-0728:git-Spigot-03bd4b0-342194e]
… 8 more