One Calendar App Won't Open

I donwloaded the One Calendar app from the Microsoft store for Windows 10. When I click launch, the app opens and immediately shows an error. "An unexpected error occurred in the application. Please close and restart the app." This just continues and I can't open the app. I already tried all the basics, uninstall/reinstall, turn off anti-virus, check Windows updates, reset store, reset app, etc. Any help would be appreciated, as I'd really like to use this app!