[EffectLib bug] Apache Commons not found

Caused by: java.lang.ClassNotFoundException: net.minecraft.util.org.apache.commons.lang3.Validate
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:91) ~[spigot.jar:git-Spigot-ae40327-21681b3]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:86) ~[spigot.jar:git-Spigot-ae40327-21681b3]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_25]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_25]
        at de.slikey.effectlib.effect.EntityEffect.<init>(EntityEffect.java:16)~[?:?]
        at de.slikey.effectlib.effect.ShieldEntityEffect.<init>(ShieldEntityEffect.java:33) ~[?:?]
        at me.hugmanrique.avanzado1.Texto.onCommand(Texto.java:37) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot.jar:git-Spigot-ae40327-21681b3]
        ... 15 more
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