My TomTom GO app for iPhone 5S doesn't speak

southernman Registered Users Posts: 2
New Traveler
I switched from TomTom to TomTom Go, but suddenly I realized that no guide voice come out from the phone. Trps are correctly shown on the phone, as well as speed control cameras, but no voice arise to guide me; i have to look at the screen and it's almost impossible when I drive alone. I try to change and reinstall voices, but nothing changes. I have subscribet unlimited navigation until 2020. IOS il 11.2.6
Please help me, or I will have to discontinue TomTom, that was wery useful using the old app

Venice area, Italy