"Could Not log in to world of warcraft at this time. Please try again later."

Hi

I just downloaded the WOTLK client from the website. I cannot log in. I have set the realmlist.

What can I do?

Please help.

Sometimes it says that my credentials are wrong and after 2-3 attempts I get the message above.

I have now tried 2 different clients... What am I doing wrong?

this is ****ing annoying, I can't play bc of this rn :| it keeps saying the information isn't correct (which is wrong) and after multiple attempts, it says the same message...