Hi, I just created an account to post the same issue, happy to see I am not alone! Unlike @Levelord, I did migrate to a Private Division account and downloaded KSP once last year, I believe. But now the website doesn't work anymore, login in or registering with them is not possible, all account-related links lead to a 502 Bad Gateway error. I guess we can only hope that they are updating the server or something, will try again in a few days.