Please update the plugin ProtocolLib to it's latest version so the plugin Lib's DIsguises can be usable, thank you!
link: https://ci.dmulloy2.net/job/ProtocolLib/lastStableBuild/
Lib's Disguises have already been updated to its newest version on Aternos, so ProtocolLib is the only obstacle that's standing between me and some sweet disguises :))