New forecast data analytics tool doesn't work

Hi everybody,

I write here because I have a problem, I downloaded the new version of PowerBI and activate in option preview forecast but it doesn't work. I've seen the conditions on the Power BI page to have the option on the analytics tools (so the y axis with x in date format, not a donut chart of course and so on). My chart respects all the conditions but the option "forecast" in the data analytics tools never appear. I even try the online Power BI version (English) and it doesn't work (I work with Power BI desktop in French)

Can someone could help me please?

Thank you very much! Have a nice day!
Regards,
Anabelle