I am unable to log in from a country that is not permitted from logging in.
You can log in from countries that have not been registered as login permitted countries by verifying your KakaoTalk or email.

Confirm the login request message sent to your phone's KakaoTalk or enter the verification number sent to the email saved in your Kakao Account or contacts to login.

Please contact the Customer Center if you are unable to log in using additional verification methods.