Hello,
please log out from all of you accounts (Facebook, Oasgames account and forum account). Clear your cache and try to login back to your account. If it's not going to help, please fill this report form :
Platform (Browser/Facebook/Client) :
Server ID :
Character Name :
UID (If you are using Facebook account, you can find your UID on the bottom of the page. For players with OAS account : go to your profile - "change nickname") :
Bug Description :
Screenshot :
Operation System :
Resolution :
Your computer time-zone/Country :
Are you using VPN or not ? :
Las time you were able to use your character/account :
Please remember, without any of this info we won't be able to help you.