I tried uninstalling 2x and reinstalling. The mobile app is not working on my IPhone 12 pro

IOS 12.3.2. I spoke to Concur support and my company- no one has an answer. A pop-up window appears saying go to settings and that i need a passcode. Under settings Concur settings is greyed out and location services will not change from never to while using App. Any suggestions? Thanks so much !