Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Fix for this issue....Due to resent changes with Microsoft they have create this issue. Ive had no issue in the past up until they change security features. You will have to fix this issue by signing into admin account under expand billing and select Billing accounts then Add an associated billing tenant. When selected you will have a popup Add an associated billing tenant just put your domain and the field for tenant just search for your email and select it. Once you have selected your user sign out and back in and you should be able to add services.