Lightroom mobile can't connect to my camera

Hi, I have a hard time to connect my camera directly to lightroom mobile via wifi. I enable wifi and properly connect to my mobile phone (with correct SSID and PW). And, when I go into lightroom mobile, and tap the "add photos' and tap 

"from camra device" it keeps saying "no connected camera device found". I have enable my photo to lightroom mobile to access my file on the photo, which is through "prvacy security", then files and folders setting on my iphone. Does anyone have this issue? How to I solve it. 

I also tried to reboot my phone and camera. Also, tried to remove the lightroom mobile and reinstall, none of those works.