Petcare says im walking my dog, but i cant stop it

I’ve used pet care to walk dog with a smart tag before . I started a walk a few days ago. But the phone crashed. Now, when i open the app, the current location part shows ‘nearby’, but the ‘view map’ button is grayed out.
Swiping down (screen). On the screen, it shows ‘you’re walking your dog’
How do i reset the app
Or stop the exercise
Thanks