Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hello
Are you trying to log into apps like Word, Excel, Powerpoint? If so, Microsoft 365 Basic plan doesn't include those. This plan is for 100GB OneDrive storage only. https://www.microsoft.com/en-us/microsoft-365/p/microsoft-365-basic/cfq7ttc0ktxs
If you need to use the office apps, you can either use the free web version via www.office.com > apps, or you will need the Microsoft 365 personal plan instead.