Nearby friends map no longer showing

Hello All!
I have been using Nearby Friends for 6 months but suddenly it has stopped working. It is definitely switched on as friends can see my location but I have no map and no location symbol next to friends names although it does give me their infomation (John smith is 2km away etc). It doesnt give me the option to request precise location.

Please help, i have tried reinstalling facebook. All other location apps are working including google maps. I have also updated my Samsung Galaxy S5 to the latest software as of today.

Thank you