Bukkit

What steps will reproduce the problem?
1.  Restart the server from console, running Spigot 1.8.8 Buildtools 45
2.
3.

What is the expected output? What do you see instead?
-see below-

What version of the product are you using?
1.6

Do you have an error log of what happened?
-see below-

Please provide any additional information below.

[23:00:27] [Server thread/ERROR]: Error occurred while enabling Quake v1.6 (Is it up to date?)
java.lang.NullPointerException
    at com.tigerhix.framework.model.JoinSign.<init>(JoinSign.java:40) ~[?:?]
    at com.tigerhix.quake.QuakePlugin.signsList(QuakePlugin.java:206) ~[?:?]
    at com.tigerhix.framework.Plugin.onEnable(Plugin.java:44) ~[?:?]
    at com.tigerhix.quake.QuakePlugin.onEnable(QuakePlugin.java:46) ~[?:?]
    at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:321) ~[spigot-BT45_1.8.8_09.21.jar:git-Spigot-76236cb-62a2169]
    at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:340) [spigot-BT45_1.8.8_09.21.jar:git-Spigot-76236cb-62a2169]
    at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:405) [spigot-BT45_1.8.8_09.21.jar:git-Spigot-76236cb-62a2169]
    at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugin(CraftServer.java:357) [spigot-BT45_1.8.8_09.21.jar:git-Spigot-76236cb-62a2169]
    at org.bukkit.craftbukkit.v1_8_R3.CraftServer.enablePlugins(CraftServer.java:317) [spigot-BT45_1.8.8_09.21.jar:git-Spigot-76236cb-62a2169]
    at net.minecraft.server.v1_8_R3.MinecraftServer.s(MinecraftServer.java:414) [spigot-BT45_1.8.8_09.21.jar:git-Spigot-76236cb-62a2169]
    at net.minecraft.server.v1_8_R3.MinecraftServer.k(MinecraftServer.java:378) [spigot-BT45_1.8.8_09.21.jar:git-Spigot-76236cb-62a2169]
    at net.minecraft.server.v1_8_R3.MinecraftServer.a(MinecraftServer.java:333) [spigot-BT45_1.8.8_09.21.jar:git-Spigot-76236cb-62a2169]
    at net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.java:263) [spigot-BT45_1.8.8_09.21.jar:git-Spigot-76236cb-62a2169]
    at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:525) [spigot-BT45_1.8.8_09.21.jar:git-Spigot-76236cb-62a2169]
    at java.lang.Thread.run(Thread.java:745) [?:1.8.0_60]