Telling you the username is correct but the password is wrong would confirm to a hacker that a specific account exists. This prevents "user enumeration" attacks.
Sometimes the error feels "exclusive" to one device. You might be able to log in on your laptop but not your phone. This usually happens because: wrong username or password artinya exclusive
It’s one of the most common—and annoying—phrases in the digital world: Telling you the username is correct but the