OmniFocus not launching on my iPhone


I’m using OmniFocus 3.4 on an iPhone 7 running iOS 13.2.3. When I try to open OmniFocus, the splash screen briefly appears, before I’m returned to the home screen. However, OmniFocus remains visible in the App Switcher, but when I tap on it there, I get the same behaviour. Restarting the iPhone didn’t help. Is anyone else experiencing the same?