I'm guessing you're using the Better BibTeX plugin. A version released yesterday contained a bug. Update to the latest version of BBT from the gear menu in Tools → Add-ons and this will be fixed.
(If that's not the problem, you'd have to say more about what exactly is happening and provide a Report ID. Posting in French is fine, but just saying Zotero doesn't work isn't.)
Upgrade Storage
(If that's not the problem, you'd have to say more about what exactly is happening and provide a Report ID. Posting in French is fine, but just saying Zotero doesn't work isn't.)