Hello Erick,
Thanks for posting your question in the Microsoft Q&A forum.
To resolve the error
Ensure you have the correct role assigned to your account for the Document Intelligence resource. You typically need one of these roles (Cognitive Services User, Contributor, Owner)
Confirm that you're accessing the correct resource and subscription in the Document Intelligence Studio settings
Ensure your subscription has enough quota and that there are no outstanding billing issues.
Please don't forget to close up the thread here by upvoting and accept it as an answer if it is helpful