If you are having issues with your app you can do a few things:
1. Refresh your app to make sure if is fully up to date.
2. Clear your cache. You can do this by going to "Settings" on the bottom menu bar. Scroll down in setting to "Clear Cache" which is right about the Logout button.
3. If your app is still not working properly after the first two steps, submit a support ticket to https://help.on-doc.com/support/tickets/new and let us know what is going on! Screen shots are best to help us help you!