The ticket must have been printed prior to your visit at least in principle, but it seems they may agree, at their own discretion, to print it for you if you have forgotten it (or claim to…). From the Terms and Conditions (the link is to the French version; the language can be changed using the list at the top-right corner):
The ticket must have been printed by the buyer prior to their visit,
with no changes to the print size, in full page view, on white A4
paper, blank on both sides. Partially or incorrectly printed, soiled,
damaged or illegible tickets will not be valid. The buyer is required
to check the details and condition of the tickets purchased online and
printed.No ticket purchased online may be collected on site.
If a
ticket has been forgotten, damaged, incorrectly printed or has an
error in the ticket-holder’s name, the EPML reserves the right to
reprint it in order to assist with the visitor admission process.
Credit:stackoverflow.com‘
4 Mar, 2024
4 Mar, 2024