Location Permission Denied

Hi I’ve created a custom private VPS location also scanned the sign for the mesh and all of it works perfectly. I’m using Android and I can see my AR very well. But when I asked my colleagues, they use iPhone they can’t seem to open it. It says “LOCATION PERMISSION DENIED. PLEASE ALLOW AND TRY AGAIN.” Which they have enabled the location permission already. I’ve also asked them for error message.

Please follow these steps to allow Safari to request location permissions: Turn Location Services and GPS on or off on your iPhone, iPad, or iPod touch - Apple Support.