Hello,
I have correctly installed MVP and its prerequisites but It will not let me create portals, saying "An Internal Error occurred". Most guides say downgrade my world edit or remove it, but after trying this still happens, even with world edit removed. I am using MVP 2.4 (2.5 does not work at all).
Log:
04.04 13:04:47 [Server] INFO GunnerBones issued server command: /mvp create Cportal 04.04 13:04:47 [Server] ERROR null 04.04 13:04:47 [Server] INFO org.bukkit.command.CommandException: Unhandled exception executing command 'mvp' in plugin Multiverse-Portals v2.4-b548 04.04 13:04:47 [Server] INFO at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[craftbukkit-1.9.jar:git-Bukkit-f326992] 04.04 13:04:47 [Server] INFO at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:140) ~[craftbukkit-1.9.jar:git-Bukkit-f326992] 04.04 13:04:47 [Server] INFO at org.bukkit.craftbukkit.v1_9_R1.CraftServer.dispatchCommand(CraftServer.java:624) ~[craftbukkit-1.9.jar:git-Bukkit-f326992] 04.04 13:04:47 [Server] INFO at net.minecraft.server.v1_9_R1.PlayerConnection.handleCommand(PlayerConnection.java:1298) [craftbukkit-1.9.jar:git-Bukkit-f326992] 04.04 13:04:47 [Server] INFO at net.minecraft.server.v1_9_R1.PlayerConnection.a(PlayerConnection.java:1158) [craftbukkit-1.9.jar:git-Bukkit-f326992] 04.04 13:04:47 [Server] INFO at net.minecraft.server.v1_9_R1.PacketPlayInChat.a(SourceFile:37) [craftbukkit-1.9.jar:git-Bukkit-f326992] 04.04 13:04:47 [Server] INFO at net.minecraft.server.v1_9_R1.PacketPlayInChat.a(SourceFile:9) [craftbukkit-1.9.jar:git-Bukkit-f326992] 04.04 13:04:47 [Server] INFO at net.minecraft.server.v1_9_R1.PlayerConnectionUtils$1.run(SourceFile:13) [craftbukkit-1.9.jar:git-Bukkit-f326992] 04.04 13:04:47 [Server] INFO at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_77] 04.04 13:04:47 [Server] INFO at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_77] 04.04 13:04:47 [Server] INFO at net.minecraft.server.v1_9_R1.SystemUtils.a(SourceFile:45) [craftbukkit-1.9.jar:git-Bukkit-f326992] 04.04 13:04:47 [Server] INFO at net.minecraft.server.v1_9_R1.MinecraftServer.D(MinecraftServer.java:679) [craftbukkit-1.9.jar:git-Bukkit-f326992] 04.04 13:04:47 [Server] INFO at net.minecraft.server.v1_9_R1.DedicatedServer.D(DedicatedServer.java:361) [craftbukkit-1.9.jar:git-Bukkit-f326992] 04.04 13:04:47 [Server] INFO at net.minecraft.server.v1_9_R1.MinecraftServer.C(MinecraftServer.java:635) [craftbukkit-1.9.jar:git-Bukkit-f326992] 04.04 13:04:47 [Server] INFO at net.minecraft.server.v1_9_R1.MinecraftServer.run(MinecraftServer.java:539) [craftbukkit-1.9.jar:git-Bukkit-f326992] 04.04 13:04:47 [Server] INFO at java.lang.Thread.run(Thread.java:745) [?:1.8.0_77] 04.04 13:04:47 [Server] INFO Caused by: java.lang.NoSuchMethodError: org.bukkit.Server.getOnlinePlayers()[Lorg/bukkit/entity/Player; 04.04 13:04:47 [Server] INFO at com.onarandombox.MultiversePortals.MVPortal.addToUpperLists(MVPortal.java:157) ~[?:?] 04.04 13:04:47 [Server] INFO at com.onarandombox.MultiversePortals.MVPortal.init(MVPortal.java:92) ~[?:?] 04.04 13:04:47 [Server] INFO at com.onarandombox.MultiversePortals.MVPortal.<init>(MVPortal.java:61) ~[?:?] 04.04 13:04:47 [Server] INFO at com.onarandombox.MultiversePortals.MVPortal.<init>(MVPortal.java:219) ~[?:?] 04.04 13:04:47 [Server] INFO at com.onarandombox.MultiversePortals.utils.PortalManager.addPortal(PortalManager.java:126) ~[?:?] 04.04 13:04:47 [Server] INFO at com.onarandombox.MultiversePortals.commands.CreateCommand.runCommand(CreateCommand.java:62) ~[?:?] 04.04 13:04:47 [Server] INFO at com.pneumaticraft.commandhandler.multiverse.CommandHandler.checkAndRunCommand(CommandHandler.java:279) ~[?:?] 04.04 13:04:47 [Server] INFO at com.pneumaticraft.commandhandler.multiverse.CommandHandler.processFoundCommands(CommandHandler.java:143) ~[?:?] 04.04 13:04:47 [Server] INFO at com.pneumaticraft.commandhandler.multiverse.CommandHandler.locateAndRunCommand(CommandHandler.java:93) ~[?:?] 04.04 13:04:47 [Server] INFO at com.pneumaticraft.commandhandler.multiverse.CommandHandler.locateAndRunCommand(CommandHandler.java:71) ~[?:?] 04.04 13:04:47 [Server] INFO at com.onarandombox.MultiversePortals.MultiversePortals.onCommand(MultiversePortals.java:317) ~[?:?] 04.04 13:04:47 [Server] INFO at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[craftbukkit-1.9.jar:git-Bukkit-f326992] 04.04 13:04:47 [Server] INFO ... 15 more

Does someone know a fix? Thanks, Gunner

The fix is to use the latest dev builds. They are available here: http://ci.onarandombox.com/view/Multiverse/
These versions are verified working with 1.8 and 1.9. If you are having trouble installing plugins on your server, you may need to contact support for your server hosting provider.