Ya it just looks like they used the wrong password when trying to log in or maybe an incorrect username.
If you want to add a custom message to your block pages, navigate to Wordfence > All Options > Brute Force Protection > Custom text shown on block pages. I always recommend adding an email that locked out users can email to request an unlock.
Wordfence Plugin support suggestion:
Ya it just looks like they used the wrong password when trying to log in or maybe an incorrect username.
If you want to add a custom message to your block pages, navigate to Wordfence > All Options > Brute Force Protection > Custom text shown on block pages. I always recommend adding an email that locked out users can email to request an unlock.