Changeskin install on bungeecord and every spigot, database is mysql, spigot 1.9.2, protocollib 4.0.1
so instantSkinChange not work, player must relog to update skin.
and, this error appear after run command /skin skin-name:
http://paste.ubuntu.com/17656356/

Do you updated the bungeecord version?

Nevermind, my mistake