WordPress Speed Up Service | WordPress Website Maintenance Packages Reply To: Please provide a valid username., by bdavidz Running into same issue with 5 minute install lately. Have tried troubleshooting without luck. Have discovered that it’s not creating a user database, but yet to figure out how to fix without manually adding users in phpMyAdmin. Has only been happening lately (within the past 3 weeks or so). Thinking might be a current of WP version or some Mac update (last part at least for me). Any ideas appreciated. Related string: https://wordpress.org/support/topic/error-invalid-username-lost-your-password-4/ Reply To: Please provide a valid username.