Quote Originally Posted by Astrus View Post
Check your armory and the other various inventory systems.
Your profile shows you have a level 90, I can't think of any items getting removed from the game since EW so it's probably not that.
Depending on what happened during your hiatus your saved gearsets might simply be looking for items you have since replaced, like if you've restored your saved settings from a backup that wasn't quite up to date.
Additional note, gearsets are client-side, I believe. Gear can appear "missing" if your gearset is old and looking for gear that you've since removed on a different client.