Hi,
I'm Tim, an Independent Advisor here and a Microsoft user like you. I don't work for Microsoft and do not have access to any of your data on their system.
I’m sorry that your experiencing issues. Essentially this app is an enterprise app, not intended for home users.
Your account will not have a license unless it is a business account and your company is paying for the endpoint protection. If this is the case you should contact your IT department.
The app description on the playstore should explain this: “This app is not a free app and is for business/enterprise users only.”
I hope this information helps. If you have questions, please let me know and I'll be glad to assist you further or If you find it helpful, you can mark this comment as the answer.
Kind regards
Tim