Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
WORKING AGAIN!
Just been on the phone with Microsoft support and have NOW SORTED the issue. Basically they have made some changes their end so the workaround for now is:- As the lead/admin member of the Family group, go into your Microsoft account, go to Subscriptions, click STOP SHARING to each family member, then click START SHARING to each one. I know some people tried this earlier but that must have been before they made changes their end. I was assured no-one would loose any data etc....
Has worked for me.