Dynamic Subscription

Hi CedricSantos, 

According to the documentation, these are the prerequisites: 

• A report to share that is saved in a workspace backed by a capacity (Power BI Premium capacity or Microsoft Fabric capacity).
• Build permissions to a Power BI semantic model that contains recipient data. This data includes the email addresses of your recipients and filter values that should be applied for each recipient.
• A Contributor, Member, or Admin role in that workspace. You know that you have the Contributor, Member, or Admin role in a workspace if you're able to edit reports or dashboards in that workspace. Read more about Roles in workspaces.
• The user can't be a guest user. Guest users can't subscribe others and dynamic subscriptions can always bring in "others" through datasets. Therefore, guest users can't create dynamic subscriptions.

Can you double check that the workspace is assigned to the capacity, and that you have at least contributor permissions on the workspace? 

If you have a PPU license, the workspace may have been assigned to a PPU capacity instead of the trial capacity.