There is an issue going around iEra which can happen to any player. I still don't know what's causing this and if encountered, it can not be fixed. Players have been recently getting their accounts un-linked from their accounts, this has not been fixed yet. Hopefully, admins will check into this and will give us access back to our accounts.
---Quick Update---
This happens to all servers too, so if your email un-links from your graal account, it happens on all servers such as Classic, Zone and Ol' West, not just iEra.