@Carolina As mentione din the doc here- https://learn.microsoft.com/en-us/rest/api/storageservices/find-blobs-by-tags#authorization
The following users can perform this operation:
- The account owner.
- Anyone with a shared access signature (SAS) who has permission to find blobs by tags (the f SAS permission). An account SAS is required for authorization.
- Role-based access control (RBAC) users who have the Microsoft.Storage/storageAccounts/blobServices/containers/blobs/filter/action permission.
However, you are saying that you already tried using the Account owner role and you still cannot access it, right?