Please note that this is the French Q&A Forum, any content should be posted in French. However, I will still provide an answer on English based on your initial response.
Hi Maxence GAY, welcome to Microsoft Q&A forum.
Please understand questions about this topic is outside the scope of Microsoft Q&A. For Copilot Studio-related issues, I recommend posting on the Power Platform/Copilot Studio forum for more specialized support:
Microsoft Power Platform Community
You’ll likely find more targeted guidance, and others who’ve encountered similar challenges can share their experiences.
I hope this points you to the right direction.