Google has modified the Google News platform. Now is called "Publisher Center" and all tenants should share with us the account, exactly the same as Google Search Console.
Please, request your tenants to grant the access using the Marfeel account: firstname.lastname@example.org
More about Publisher Center:
How to share the account:
1.- Using the same email account than GSC, visit this URL: https://publishercenter.google.com/publications#p:id=pfehome
2.- On the left sidebar, click on "User permissions"
3.- on the following page, click on "Add user":
4.1.- Complete the email with "email@example.com"
4.2.- Select the "Editor" option
4.3.- Click "Add" at the bottom