the plugin permission ex is outdated quite a bit,it has been found out that permission ex is now compatable for minecraft 1.9 and 1.10 the link to permission ex is:https://dev.bukkit.org/bukkit-plugins/permissionsex/ please update it 
Posts by MIHAIdavid33
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please update ultimatecore http://dev.bukkit.org/bukkit-plugins/ultimatecore/ to 1.9
