Make sure you have your lcd plugged in correctly, iirc there are three spots to plug in the LCD and only one works.
As a complete workaround you could install something like octoprint on a raspberry pi or another computer and hook up the printer and confirm you can control it via the webpage.
It looks like the charges are from using the credentials they found not just for finding them. It’s definitely a crap charge because logging into the DB exposed the wider issue of being able to access other customers records.