Won't join a job?

So, I recently started a Towny server, it's still in development and everything is going good and fine. One thing I can't overcome though, is why I can't get jobs to work. The plugin itself is working, like, /jobs brings up the menu and all, but, when you go to join a job, for example /jobs join Hunter, it just brings up the menu as if all you did was type /jobs. It really confuses me cuz I've looked at the code and I could not find anything wrong that could be causing this.

Here is the template I am using for my jobs plugin atm:

# Jobs configuration.
#
# Stores information about each job.
#
# For example configurations, visit http://dev.bukkit.org/server-mods/jobs/.

Jobs:
Lumberjack:
fullname: Lumberjack
shortname: L
description: Earns money felling and planting trees
ChatColour: GREEN
chat-display: full
leveling-progression-equation: 100*((1.13+(0.01*(numjobs-1)))^(joblevel-1))
income-progression-equation: baseincome*((1.05)^(joblevel-1))
experience-progression-equation: baseexperience*((1.05)^(joblevel-1))
Break:
LOG:
income: 5.0
experience: 5.0
Place:
SAPLING:
income: 1.0
experience: 1.0
WOOD:
income: 2.0
experience: 2.0
Kill:
Player:
income: 7.5
experience: 7.5
permissions:
aaaaaatest.node:
value: true
level: 0
aaaaaatest.node2:
value: true
level: 10
Miner:
fullname: Miner
shortname: M
description: Earns money mining minerals and ores.
ChatColour: DARK_GRAY
chat-display: full
leveling-progression-equation: 100*((1.13+(0.01*(numjobs-1)))^(joblevel-1))
income-progression-equation: baseincome*((1.05)^(joblevel-1))
experience-progression-equation: baseexperience*((1.05)^(joblevel-1))
Break:
STONE:
income: 2.0
experience: 2.0
COAL_ORE:
income: 3.0
experience: 3.0
GLOWING_REDSTONE_ORE:
income: 3.0
experience: 3.0
IRON_ORE:
income: 4.0
experience: 4.0
GOLD_ORE:
income: 5.0
experience: 5.0
LAPIS_ORE:
income: 5.0
experience: 5.0
DIAMOND_ORE:
income: 6.0
experience: 6.0
OBSIDIAN:
income: 7.5
experience: 7.5
MOSSY_COBBLESTONE:
income: 6.0
experience: 6.0
Place:
RAILS:
income: 2.0
experience: 2.0
IRON_ORE:
income: -5.0
experience: -5.0
GOLD_ORE:
income: -6.0
experience: -6.0
Kill:
Player:
income: 7.5
experience: 7.5
Builder:
fullname: Builder
shortname: B
description: Earns money for building structures.
ChatColour: WHITE
chat-display: full
leveling-progression-equation: 100*((1.13+(0.01*(numjobs-1)))^(joblevel-1))
income-progression-equation: baseincome*((1.05)^(joblevel-1))
experience-progression-equation: baseexperience*((1.05)^(joblevel-1))
Place:
COBBLESTONE:
income: 1.0
experience: 1.0
WOOD:
income: 1.5
experience: 1.5
FENCE:
income: 1.5
experience: 1.5
WOOL:
income: 1.5
experience: 1.5
STONE:
income: 2.25
experience: 2.25
GLOWSTONE:
income: 3.0
experience: 3.0
SANDSTONE:
income: 2.0
experience: 2.0
GLASS:
income: 3.0
experience: 3.0
BRICK:
income: 4.0
experience: 4.0
LAPIS_BLOCK:
income: 5.0
experience: 5.0
DOUBLE_STEP:
income: 2.0
experience: 2.0
STEP:
income: 2.0
experience: 2.0
BOOKSHELF:
income: 3.0
experience: 3.0
WOOD_STAIRS:
income: 2.0
experience: 2.0
COBBLESTONE_STAIRS:
income: 2.0
experience: 2.0
MOSSY_COBBLESTONE:
income: 5.0
experience: 5.0
DIAMOND_BLOCK:
income: 5.0
experience: 5.0
GOLD_BLOCK:
income: 5.0
experience: 5.0
Kill:
Player:
income: 7.5
experience: 7.5
Digger:
fullname: Digger
shortname: D
description: Earns money for terraforming the world.
ChatColour: GOLD
chat-display: full
leveling-progression-equation: 100*((1.13+(0.01*(numjobs-1)))^(joblevel-1))
income-progression-equation: baseincome*((1.05)^(joblevel-1))
experience-progression-equation: baseexperience*((1.05)^(joblevel-1))
Break:
DIRT:
income: 2.0
experience: 2.0
GRASS:
income: 2.0
experience: 2.0
GRAVEL:
income: 2.0
experience: 2.0
SAND:
income: 2.0
experience: 2.0
CLAY:
income: 2.0
experience: 2.0
Kill:
Player:
income: 7.5
experience: 7.5
custom-kill:
Digger:
income: 10.0
experience: 10.0
Farmer:
fullname: Farmer
shortname: Fa
description: Earns money farming crops.
ChatColour: BLUE
chat-display: full
leveling-progression-equation: 100*((1.13+(0.01*(numjobs-1)))^(joblevel-1))
income-progression-equation: baseincome*((1.05)^(joblevel-1))
experience-progression-equation: baseexperience*((1.05)^(joblevel-1))
Break:
CROPS-7:
income: 4.0
experience: 4.0
SUGAR_CANE_BLOCK:
income: 4.0
experience: 4.0
Place:
CROPS-0:
income: 3.0
experience: 3.0
SUGAR_CANE_BLOCK:
income: 1.0
experience: 1.0
Kill:
Player:
income: 7.5
experience: 7.5
Hunter:
fullname: Hunter
shortname: H
description: Earns money killing animals and monsters.
ChatColour: RED
chat-display: full
leveling-progression-equation: 100*((1.13+(0.01*(numjobs-1)))^(joblevel-1))
income-progression-equation: baseincome*((1.05)^(joblevel-1))
experience-progression-equation: baseexperience*((1.05)^(joblevel-1))
Kill:
Chicken:
income: 2.5
experience: 2.5
Cow:
income: 2.5
experience: 2.5
Pig:
income: 2.5
experience: 2.5
Sheep:
income: 2.5
experience: 2.5
Wolf:
income: 5.0
experience: 5.0
Creeper:
income: 10.0
experience: 10.0
Skeleton:
income: 10.0
experience: 10.0
Spider:
income: 10.0
experience: 10.0
Zombie:
income: 10.0
experience: 10.0
Player:
income: 7.5
experience: 7.5
Fisherman:
fullname: Fisherman
shortname: Fi
description: Earns money from fishing.
ChatColour: AQUA
chat-display: full
leveling-progression-equation: 100*((1.13+(0.01*(numjobs-1)))^(joblevel-1))
income-progression-equation: baseincome*((1.05)^(joblevel-1))
experience-progression-equation: baseexperience*((1.05)^(joblevel-1))
Fish:
RAW_FISH:
income: 4.0
experience: 4.0
Kill:
Player:
income: 7.5
experience: 7.5
Weaponsmith:
fullname: Weaponsmith
shortname: W
description: Earns money from crafting and repairing weapons.
ChatColour: DARK_PURPLE
chat-display: full
leveling-progression-equation: 100*((1.13+(0.01*(numjobs-1)))^(joblevel-1))
income-progression-equation: baseincome*((1.05)^(joblevel-1))
experience-progression-equation: baseexperience*((1.05)^(joblevel-1))
Craft:
WOOD_SWORD:
income: 1.0
experience: 1.0
IRON_SWORD:
income: 2.0
experience: 2.0
GOLD_SWORD:
income: 3.0
experience: 3.0
DIAMOND_SWORD:
income: 4.0
experience: 4.0
Repair:
WOOD_SWORD:
income: 1.0
experience: 1.0
IRON_SWORD:
income: 2.0
experience: 2.0
GOLD_SWORD:
income: 3.0
experience: 3.0
DIAMOND_SWORD:
income: 4.0
experience: 4.0
Smelt:
IRON_INGOT:
income: 2.0
experience: 2.0
GOLD_INGOT:
income: 2.0
experience: 2.0
Brewer:
fullname: Brewer
shortname: Br
description: Earns money brewing potions.
ChatColour: LIGHT_PURPLE
chat-display: full
leveling-progression-equation: 100*((1.13+(0.01*(numjobs-1)))^(joblevel-1))
income-progression-equation: baseincome*((1.05)^(joblevel-1))
experience-progression-equation: baseexperience*((1.05)^(joblevel-1))
Brew:
NETHER_STALK:
income: 1.0
experience: 1.0
REDSTONE:
income: 2.0
experience: 2.0
GLOWSTONE_DUST:
income: 2.0
experience: 2.0
SPIDER_EYE:
income: 2.0
experience: 2.0
FERMENTED_SPIDER_EYE:
income: 2.0
experience: 2.0
BLAZE_POWDER:
income: 2.0
experience: 2.0
SUGAR:
income: 2.0
experience: 2.0
SPECKLED_MELON:
income: 4.0
experience: 4.0
MAGMA_CREAM:
income: 4.0
experience: 4.0
GHAST_TEAR:
income: 4.0
experience: 4.0
Enchanter:
fullname: Enchanter
shortname: E
description: Earns money enchanting weapons.
ChatColour: DARK_BLUE
chat-display: full
leveling-progression-equation: 100*((1.13+(0.01*(numjobs-1)))^(joblevel-1))
income-progression-equation: baseincome*((1.05)^(joblevel-1))
experience-progression-equation: baseexperience*((1.05)^(joblevel-1))
Enchant:
WOOD_SWORD:
income: 4.0
experience: 4.0
IRON_SWORD:
income: 6.0
experience: 6.0
GOLD_SWORD:
income: 8.0
experience: 8.0
DIAMOND_SWORD:
income: 10.0
experience: 10.0
None:
fullname: None
shortname: N
ChatColour: WHITE
chat-display: none
leveling-progression-equation: 100*((1.13+(0.01*(numjobs-1)))^(joblevel-1))
income-progression-equation: baseincome*((1.05)^(joblevel-1))
experience-progression-equation: baseexperience*((1.05)^(joblevel-1))
Kill:
Player:
income: 7.5

and my generalConfig incase it also is needed:

# The general configuration for the jobs plugin mostly includes how often the plugin
# saves user data (when the user is in the game), the storage method, whether
# to broadcast a message to the server when a user goes up a skill level.
# It also allows admins to set the maximum number of jobs a player can have at
# any one time.

# Default language. Use your languages two digit ISO 639-1 code, and optionally followed by the ISO-3166-1 country code.
# Example: en, en_US
locale-language: en
# storage method, can be MySQL, sqlite
storage-method: sqlite
# Requires Mysql.
mysql-username: root
mysql-password: ''
mysql-hostname: localhost:3306
mysql-database: minecraft
mysql-table-prefix: jobs_
# How often in minutes you want it to save. This must be a non-zero number
save-period: 10
# Should player data be saved on disconnect?
# Player data is always periodically auto-saved and autosaved during a clean shutdown.
# Only enable this if you have a multi-server setup, or have a really good reason for enabling this.
# Turning this on will decrease database performance.
save-on-disconnect: true
# Do all players get a message when somone goes up a skill level?
broadcast-on-skill-up: false
# Do all players get a message when somone goes up a level?
broadcast-on-level-up: false
# Maximum number of jobs a player can join.
# Use 0 for no maximum
max-jobs: 3
# Hide jobs from player if they lack the permission to join the job
hide-jobs-without-permission: false
# option to allow payment to be made when killing mobs from a spawner
enable-pay-near-spawner: false
# option to allow payment to be made in creative mode
enable-pay-creative: false
# Adds the Jobs xp recieved to the player's Minecraft XP bar
add-xp-player: false
# Modifys chat to add chat titles. If you're using a chat manager, you may add the tag {jobs} to your chat format and disable this.
modify-chat: false
# Changes how often, in seconds, players are paid out. Default is 5 seconds.
# Setting this too low may cause tick lag. Increase this to improve economy performance (at the cost of delays in payment)
economy-batch-delay: 5
# Enable async economy calls.
# Only enable if your economy plugin is thread safe, use with EXTREME caution.
economy-async: false

as another note, I also found this in console:

[19:40:32] [Server thread/WARN]: java.lang.reflect.InvocationTargetException
[19:40:32] [Server thread/WARN]: at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[19:40:32] [Server thread/WARN]: at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
[19:40:32] [Server thread/WARN]: at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
[19:40:32] [Server thread/WARN]: at java.lang.reflect.Method.invoke(Unknown Source)
[19:40:32] [Server thread/WARN]: at me.zford.jobs.commands.JobsCommands.onCommand(JobsCommands.java:70)
[19:40:32] [Server thread/WARN]: at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
[19:40:32] [Server thread/WARN]: at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:140)
[19:40:32] [Server thread/WARN]: at org.bukkit.craftbukkit.v1_10_R1.CraftServer.dispatchCommand(CraftServer.java:626)
[19:40:32] [Server thread/WARN]: at net.minecraft.server.v1_10_R1.PlayerConnection.handleCommand(PlayerConnection.java:1299)
[19:40:32] [Server thread/WARN]: at net.minecraft.server.v1_10_R1.PlayerConnection.a(PlayerConnection.java:1159)
[19:40:32] [Server thread/WARN]: at net.minecraft.server.v1_10_R1.PacketPlayInChat.a(SourceFile:37)
[19:40:32] [Server thread/WARN]: at net.minecraft.server.v1_10_R1.PacketPlayInChat.a(SourceFile:9)
[19:40:32] [Server thread/WARN]: at net.minecraft.server.v1_10_R1.PlayerConnectionUtils$1.run(SourceFile:13)
[19:40:32] [Server thread/WARN]: at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
[19:40:32] [Server thread/WARN]: at java.util.concurrent.FutureTask.run(Unknown Source)
[19:40:32] [Server thread/WARN]: at net.minecraft.server.v1_10_R1.SystemUtils.a(SourceFile:45)
[19:40:32] [Server thread/WARN]: at net.minecraft.server.v1_10_R1.MinecraftServer.D(MinecraftServer.java:688)
[19:40:32] [Server thread/WARN]: at net.minecraft.server.v1_10_R1.DedicatedServer.D(DedicatedServer.java:361)
[19:40:32] [Server thread/WARN]: at net.minecraft.server.v1_10_R1.MinecraftServer.C(MinecraftServer.java:643)
[19:40:32] [Server thread/WARN]: at net.minecraft.server.v1_10_R1.MinecraftServer.run(MinecraftServer.java:547)
[19:40:32] [Server thread/WARN]: at java.lang.Thread.run(Unknown Source)
[19:40:32] [Server thread/WARN]: Caused by: java.lang.NullPointerException
[19:40:32] [Server thread/WARN]: at me.zford.jobs.commands.JobsCommands.join(JobsCommands.java:172)
[19:40:32] [Server thread/WARN]: ... 21 more

 

Since this is not your plguin, but someone else's, this should be moved to General Help.

There is something null at line 172 of the JobsComands class. Please create a ticket on the Towny's Bukkit-dev page.