Hi !
I was going to update my post because I found the solution but you’re so quick 🙂
Actually, I didn’t gave to my event the option to start a sale today.
You asked me earlier “My first question is whether or not the ticket sales start date has past.”
But me, I’d set up the start of sales the Nov 26th..so the box was hidden.
Thank you for your patience and sorry for the inconvenience !