Currently the Area Book app only works for full-time missionaries, so there aren't a lot of users on the forum who are able to help. If you're a missionary, you may need to contact your mission office for help.
If the "try again" message is in the Play Store, you could try clearing the cache of the Play Store by force-closing it, long-pressing the Play Store icon on your home screen, then going to App Info > Storage > Clear cache.
Samuel Bradshaw • If you desire to serve God, you are called to the work.