Problems loading TomTom GO Mobile on iOS after Maps 10.15

Gadget Registered Users Posts: 3
Apprentice Traveler
I've just upgraded my iPhone 8 to iOS 11.4.1 and then I upgraded the Maps to the latest version, presumably v10.15. Now TomTom GO Mobile, refuses to load and stays on the "Loading app" splash screen.

Anyone else experiencing this, or recommend a resolutioon?