Hi Jason, did you register for it on the Muse Console web page? @ChristopheROBERT , can we check Jason has access?
I have submitted form from Unity AI updates | Join the mailing list, and got Muse Trial for now.
Got it! We’ll get you in on it asap 
Hey @JasonXiao , can you send me your email in a DM? I’ll forward it to someone that will authorise you for access.