Strava won’t open on my Android?

I’ve been using Strava on my Android phone(s) for a decade and this week the app won’t open on my Moto unless it’s connected to Wi-Fi or has cellular coverage.  If I have bars or Wi-Fi it owns just fine, if not, it doesn’t.  I deleted the app and reinstalled it from Play Store with no change.  Since most of the time my activities are remote this is a hassle!  Ideas?   TIA!