Unauthorized Access to Email Marketing

Hi;

I used to work correctly with the email marketing section in the CRM, but in the last days, I cannot access to the Email Marketing Administration page, it shows me an error saying I dont have access to that page.

It has all the role privileges, the Administrator user for the email marketing, activated a user for me with administrator access, but if this person who was the principal user tries to acces the email marketing section, it shows the same error.

What is happening?

Thanks