Skript load error

21.05 15:56:57 [Multicraft] Server stopped
21.05 15:56:57 [Multicraft] Server shut down
21.05 15:56:56 [Multicraft] Forcefully killing server
21.05 15:56:56 [Server] INFO Java HotSpot(TM) 64-Bit Server VM warning: Exception java.lang.OutOfMemoryError occurred dispatching signal SIGTERM to handler- the VM may need to be forcibly terminated
21.05 15:56:55 [Multicraft] Terminating server via signal
21.05 15:56:30 [Server] INFO stop
21.05 15:56:30 [Server] INFO save-all
21.05 15:56:23 [Multicraft] Stopping server!
21.05 15:56:23 [Multicraft] Received restart command
21.05 15:56:18 [Server] INFO list
21.05 15:56:16 [Server] INFO ... 25 more
21.05 15:56:16 [Server] INFO at org.bukkit.plugin.java.PluginClassLoader.remappedFindClass(PluginClassLoader.java:342)
21.05 15:56:16 [Server] INFO at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
21.05 15:56:16 [Server] INFO at java.lang.ClassLoader.defineClass(ClassLoader.java:791)
21.05 15:56:16 [Server] INFO at java.lang.ClassLoader.defineClass1(Native Method)
21.05 15:56:16 [Server] INFO Caused by: java.lang.OutOfMemoryError: PermGen space
21.05 15:56:16 [Server] INFO ... 21 more
21.05 15:56:16 [Server] INFO at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
21.05 15:56:16 [Server] INFO at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
21.05 15:56:16 [Server] INFO at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:244)
21.05 15:56:16 [Server] INFO at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:268)
21.05 15:56:16 [Server] INFO at org.bukkit.plugin.java.PluginClassLoader.remappedFindClass(PluginClassLoader.java:354)
21.05 15:56:16 [Server] INFO Caused by: java.lang.ClassNotFoundException: Failed to remap class ch.njol.skript.classes.data.BukkitClasses$1
21.05 15:56:16 [Server] INFO at fy.run(ThreadMinecraftServer.java:16)
21.05 15:56:16 [Server] INFO at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:749)
21.05 15:56:16 [Server] INFO at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:862)
21.05 15:56:16 [Server] INFO at ho.r(DedicatedServer.java:309)
21.05 15:56:16 [Server] INFO at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:986)
21.05 15:56:16 [Server] INFO at ht.b(DedicatedServerListenThread.java:34)
21.05 15:56:16 [Server] INFO at iw.b(NetworkListenThread.java:57)
21.05 15:56:16 [Server] INFO at iv.d(NetServerHandler.java:220)
21.05 15:56:16 [Server] INFO at cg.b(TcpConnection.java:467)
21.05 15:56:16 [Server] INFO at cu.a(Packet3Chat.java:59)
21.05 15:56:16 [Server] INFO at iv.a(NetServerHandler.java:1182)
21.05 15:56:16 [Server] INFO at iv.chat(NetServerHandler.java:1258)
21.05 15:56:16 [Server] INFO at iv.d(NetServerHandler.java:1390)
21.05 15:56:16 [Server] INFO at org.bukkit.craftbukkit.v1_4_R1.CraftServer.dispatchCommand(CraftServer.java:538)
21.05 15:56:16 [Server] INFO at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:186)
21.05 15:56:16 [Server] INFO at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
21.05 15:56:16 [Server] INFO at net.skycraftmc.PluginManager.PluginManagerPlugin.onCommand(Unknown Source)
21.05 15:56:16 [Server] INFO at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:381)
21.05 15:56:16 [Server] INFO at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:396)
21.05 15:56:16 [Server] INFO at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:217)
21.05 15:56:16 [Server] INFO at ch.njol.skript.Skript.onEnable(Unknown Source)
21.05 15:56:16 [Server] INFO java.lang.NoClassDefFoundError: ch/njol/skript/classes/data/BukkitClasses$1
21.05 15:56:16 [Server] SEVERE Error occurred while enabling Skript v2.0 beta 7 (Is it up to date?)
21.05 15:56:13 [Server] INFO Enabling Skript v2.0 beta 7