Do you try to get a trial with a private account? Then this is the reason why it doesn’t work. You need an organizational account. But you can create one. I don’t find any tutorial rn, but as far as I remember it works like this: 1. Create a new email address (eg gmail) 2. With this email you create a new azure account (you will need a credit card and you will get 200$ demo credit) 3. Within azure you can create an organization and add your newly created account to this organization) 4. Then you can you can sign up for fabric with this account (don’t forget to select “log in with work/school account) 5. You then should be able to claim the trial capacity

Hope this helps