Hi there, huge apologies for the issues! First step is making sure your app is up to date by visiting the app store from which you downloaded it. Then search "Hallow" and see if there is an "update" button by the app, if not, then you're all up to date!
You have three solutions to try:
Option 1: Go to the "me" tab in the app, then click the gear icon in the top right, then scroll down and click "Restore Purchase"
Option2: If that doesn't work, you can try to log out and log back in by following the steps in this article link
Option 3: If not, check to make sure you have a solid internet connection, try logging in and out and then try deleting and re-downloading the app.
Of course, we're always here to help if you need it and should reach out shortly through this chat window or through e-mail at firstname.lastname@example.org :)