[20:17:17] [Server thread/INFO]: [PacketListenerApi] Enabling PacketListenerApi v3.6.0-SNAPSHOT
[20:17:17] [Server thread/ERROR]: Error occurred while enabling PacketListenerApi v3.6.0-SNAPSHOT (Is it up to date?)
java.lang.NoClassDefFoundError: com/google/gson/JsonElement
	at org.inventivetalent.update.spiget.SpigetUpdateAbstract.checkForUpdate(SpigetUpdateAbstract.java:86) ~[?:?]
	at org.inventivetalent.packetlistener.PacketListenerPlugin.onEnable(PacketListenerPlugin.java:30) ~[?:?]
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:316) ~[PaperSpigot.jar:git-PaperSpigot-1.7.9-R0.2-273-g5811366]
	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:332) [PaperSpigot.jar:git-PaperSpigot-1.7.9-R0.2-273-g5811366]
	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:412) [PaperSpigot.jar:git-PaperSpigot-1.7.9-R0.2-273-g5811366]
	at org.bukkit.craftbukkit.v1_7_R4.CraftServer.loadPlugin(CraftServer.java:477) [PaperSpigot.jar:git-PaperSpigot-1.7.9-R0.2-273-g5811366]
	at org.bukkit.craftbukkit.v1_7_R4.CraftServer.enablePlugins(CraftServer.java:395) [PaperSpigot.jar:git-PaperSpigot-1.7.9-R0.2-273-g5811366]
	at net.minecraft.server.v1_7_R4.MinecraftServer.n(MinecraftServer.java:354) [PaperSpigot.jar:git-PaperSpigot-1.7.9-R0.2-273-g5811366]
	at net.minecraft.server.v1_7_R4.MinecraftServer.g(MinecraftServer.java:328) [PaperSpigot.jar:git-PaperSpigot-1.7.9-R0.2-273-g5811366]
	at net.minecraft.server.v1_7_R4.MinecraftServer.a(MinecraftServer.java:284) [PaperSpigot.jar:git-PaperSpigot-1.7.9-R0.2-273-g5811366]
	at net.minecraft.server.v1_7_R4.DedicatedServer.init(DedicatedServer.java:227) [PaperSpigot.jar:git-PaperSpigot-1.7.9-R0.2-273-g5811366]
	at net.minecraft.server.v1_7_R4.MinecraftServer.run(MinecraftServer.java:493) [PaperSpigot.jar:git-PaperSpigot-1.7.9-R0.2-273-g5811366]
	at net.minecraft.server.v1_7_R4.ThreadServerApplication.run(SourceFile:628) [PaperSpigot.jar:git-PaperSpigot-1.7.9-R0.2-273-g5811366]
Caused by: java.lang.ClassNotFoundException: com.google.gson.JsonElement
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[?:1.8.0_131]
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:101) ~[PaperSpigot.jar:git-PaperSpigot-1.7.9-R0.2-273-g5811366]
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:86) ~[PaperSpigot.jar:git-PaperSpigot-1.7.9-R0.2-273-g5811366]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_131]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_131]
	... 13 more