Hi Morgan,
Thank you for posting, I am here to help. Please check if your Microsoft 365 license is active.
May i know if you are using Microsoft 365 account for personal, school or work?
For the meantime please try this.
Let us test if you can log in to Outlook online
open any web browsers
go to this link: outlook.office365.com
log in your Outlook account
see if you can log in without any error.
Let me know how this goes. Looking forward to helping you out. If you need more help please feel free to let me know. If the answer is helpful, please click "Accept Answer".
Best regards,
Jansher