Check if REST API is enabled

Hi Markzolotoy ,

To use the Power BI REST APIs, you need to register an Azure Active Directory (Azure AD) application in Azure. The Azure AD app establishes permissions for Power BI REST resources, and allows access to the Power BI REST APIs. To learn how to register an app, see Register an Azure AD application to use with Power BI.Some of the Power BI APIs refer to workspaces as groups. Any reference to groups means that you're working with workspaces.

In the Azure portal, you can view your app and make changes to its permissions.

1. Sign into the Azure portal.

2. Select your Azure AD tenant by selecting your account in the upper right corner of the page.

3. Select App registrations. If you can't see this option, search for it.

4. From the Owned applications tab, select your app. The application opens in the Overview tab, where you can review the Application ID.

5. Select the View API permissions tab.

To learn more details,refer:

https://docs.microsoft.com/en-us/rest/api/power-bi/ 

https://docs.microsoft.com/en-us/power-bi/developer/embedded/register-app?tabs=customers%2CAzure  

Did I answer your question? Mark my post as a solution!

Best Regards

Lucien