It's common for iPhone users to have their privacy settings set as to deny any access to the GPS location in Safari. In that case, here is how you can instruct your customers to enable access:
1. Go to Settings. Scroll down and click on Privacy.
2. Select Location Services.
3. Select Safari Websites.
4. Select either Ask Next Time or While Using the App.
Finally, return back to the link that was sent to connect to the Visual Support session