Error Code

[12:59:01] [Server thread/ERROR]: §8[§3RandomRewards§8] §cValue 'cooldownTime' is missing from the config.
[12:59:01] [Server thread/INFO]: §8[§3RandomRewards§8] §cDelete the broken config and a new (working) one will be generated
[12:59:01] [Server thread/ERROR]: §8[§3RandomRewards§8] §cValue 'cooldownTime' is wrongly written in the config..
[12:59:01] [Server thread/INFO]: §8[§3RandomRewards§8] §cDelete the broken config and a new (working) one will be generated..
[12:59:01] [Server thread/ERROR]: Could not load 'plugins\RandomRewards.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.ExceptionInInitializerError
	at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:133) ~[craftbukkit.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:336) ~[craftbukkit.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:258) [craftbukkit.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at org.bukkit.craftbukkit.v1_7_R4.CraftServer.loadPlugins(CraftServer.java:369) [craftbukkit.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at net.minecraft.server.v1_7_R4.DedicatedServer.init(DedicatedServer.java:152) [craftbukkit.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at net.minecraft.server.v1_7_R4.MinecraftServer.run(MinecraftServer.java:458) [craftbukkit.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at net.minecraft.server.v1_7_R4.ThreadServerApplication.run(SourceFile:628) [craftbukkit.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
Caused by: java.lang.ExceptionInInitializerError
	at java.lang.Class.forName0(Native Method) ~[?:1.7.0_51]
	at java.lang.Class.forName(Unknown Source) ~[?:1.7.0_51]
	at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:64) ~[craftbukkit.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:129) ~[craftbukkit.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	... 6 more
Caused by: java.lang.NumberFormatException: For input string: ""
	at java.lang.NumberFormatException.forInputString(Unknown Source) ~[?:1.7.0_51]
	at java.lang.Integer.parseInt(Unknown Source) ~[?:1.7.0_51]
	at java.lang.Integer.valueOf(Unknown Source) ~[?:1.7.0_51]
	at me.Ricecutter0.RandomRewards.Main.<clinit>(Main.java:15) ~[?:?]
	at java.lang.Class.forName0(Native Method) ~[?:1.7.0_51]
	at java.lang.Class.forName(Unknown Source) ~[?:1.7.0_51]
	at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:64) ~[craftbukkit.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:129) ~[craftbukkit.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	... 6 more