A strange "Authenticator" problem

Hello, today i tried to log ingame from a PC which belongs to my grandparents. But i see some extra field below my Password on login screen ingame and it asks for some authenticator code, okay it was sent to my mail but after i put it in (tried like 20 times already with the codes it sends to me) it says that the information entered by me is invalid. Any suggestions (i succeeded in logging in site which informes me that the problem isnt connected with my account or something similiar).
Thanks in advance...!
(3.3.5 ICC Realm)

that is becuase you have "2 step auth" on both website + ingame. If you want you can disable the in-game one and keeping website protection only

https://www.warmane.com/account > security > remove "Enable in-game protection "

Finally one of the codes worked(strangely, after i disabled the "protection" lol). Thanks for your advice!