Issue with variable product

Hello,

I have an issue with variable products.
I created all variations, as explained in several threads, and each one has a price of 0.
However when I click on the add button, it adds the item into the quote, but without it’s variation.
Which means I do’nt have any information about the added options.
I can’t send any link for now as the site is still in dev mode.
I can send a link in private only.
Thanks for your help.

PS: I bought premium version but have a license expired…