Hi Jacqueline. Welcome to justanswer.
There are two buttons on the left of the button with red triangle inside the circle. Turn on the printer and when the error appears press the button 1 first and then 2 as shown in the image that I have attached to clear the error.
Once you click this link below(http://www.justanswer.co.uk/remotedesktop/join.aspx?Session=7bef630f-d8f6-4c80-aa3e-c18056325fee)
A page will open, press I Agree.A file will automatically get downloaded. Check your download section, a file named ELSINORE.SCREENCONNECT will be present. Just open that file so that I can connect to your computer.
You have not started the session yet. If you have Mac computer then tell me as it will require a different file