We’ve recently been receiving reports of a license error (0x87E107D0) that occurs when installing the current app from the Microsoft Store. Our Windows team is working with Microsoft directly, but we have not yet found a fix.
In the meantime, you can download and install a previous version of the Olive Tree Bible App from this link: https://s3.amazonaws.com/ot.downloads/pc/BibleStudySetup_6.1.1.exe
When you have the app downloaded, you will need to log in, sync, and download your books. You can find articles on how to use this app here.