@Nang, I'm giving you a cyber hug. 😁
When you said clear the data and the cache for the APP, a bell went off. I was clearing the data and cache for the PHONE. I had no idea each app has it's own. Duh!
I installed the app, went to Settings, clicked on Apps, clicked on Navigator, clicked on Storage, then deleted Data and Cache. Voila! Opened app, signed into HAL account, and all is right with the world.
Thanks again. I hope this helps someone else.