Bukkit

[15:13:31] [Server thread/ERROR]: Could not load 'plugins/zPermissions.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.NoClassDefFoundError: com/avaje/ebean/config/NamingConvention
	at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:133) ~[spigot.jar:git-Spigot-5b8313f-1004352]
	at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:326) ~[spigot.jar:git-Spigot-5b8313f-1004352]
	at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:248) [spigot.jar:git-Spigot-5b8313f-1004352]
	at org.bukkit.craftbukkit.v1_12_R1.CraftServer.loadPlugins(CraftServer.java:301) [spigot.jar:git-Spigot-5b8313f-1004352]
	at net.minecraft.server.v1_12_R1.DedicatedServer.init(DedicatedServer.java:205) [spigot.jar:git-Spigot-5b8313f-1004352]
	at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:544) [spigot.jar:git-Spigot-5b8313f-1004352]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_131]
Caused by: java.lang.NoClassDefFoundError: com/avaje/ebean/config/NamingConvention
	at java.lang.Class.forName0(Native Method) ~[?:1.8.0_131]
	at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_131]
	at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:64) ~[spigot.jar:git-Spigot-5b8313f-1004352]
	at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:129) ~[spigot.jar:git-Spigot-5b8313f-1004352]
	... 6 more
Caused by: java.lang.ClassNotFoundException: com.avaje.ebean.config.NamingConvention
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[?:1.8.0_131]
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:101) ~[spigot.jar:git-Spigot-5b8313f-1004352]
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:86) ~[spigot.jar:git-Spigot-5b8313f-1004352]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_131]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_131]
	at java.lang.Class.forName0(Native Method) ~[?:1.8.0_131]
	at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_131]
	at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:64) ~[spigot.jar:git-Spigot-5b8313f-1004352]
	at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:129) ~[spigot.jar:git-Spigot-5b8313f-1004352]
	... 6 more

 outputted with spigot version spigot-1.12-pre5-SNAPSHOT.jar on load.