It’s saying the same thing for me. I even deleted and reinstalled the app and it won’t let me log into either of my accounts. I know it’s happening with a few others too, I believe tiktok is just being dumb again like a few months ago.
If you entered an incorrect password when you want to log into your TikTok account on the web or in the app, you will not be able to log in until you enter the correct password. And if you don't remember your TikTok password or username, it is better to use the “TikTok password reset” feature.