WORLDEDIT-3347 - Reported by Nikolaii99

http://pastebin.com/Gz5kTp6p
http://pastebin.com/E4BnvHyx
http://pastebin.com/3UTuFv1b
http://pastebin.com/zTRRKne6
http://pastebin.com/6J6gA1Ec

Eventho it says WorldGuard, the ultimate source of the error is WorldEdit:

Caused by: java.lang.NoSuchMethodError: 
ru.tehkode.permissions.PermissionManager.has(Ljava/util/UUID;Ljava/lang/String;Ljava/lang/String;)Z
	at com.sk89q.wepif.PermissionsExResolver.hasPermission(PermissionsExResolver.java:68)

This should be an easy fix by calling

ru.tehkode.permissions.PermissionsManager.has(Player p, String perm, String world);
// from
com.sk89q.wepif.PermissionsExResolver.hasPermissions();

It would make WorldEdit & WorldGuard backwards compatible because PEX's has() method (which accepts an org.bukkit.entity.Player object) exists on newer & older versions. The newer one has an implementation that forwards the call using player.getUniqueId() while the older one has an implementation that forwards the call using player.getName().

Comment by wizjany

i don't believe we have any plans to support 2 year old versions of pex which lack uuid support.