Testing to share video to Facebook always failed to load

I test everyplay with iPhone, when I click Facebook icon, and share to Facebook , it always show "failed to load" in loading page, Do I miss any setting for Xcode？or Facebook SDK？or everyplay？

(ps: Sharing to twitter and youtube succeeded)

my setting：
unity version：4.6.8f1
test device：iphone6
iOS：9.0.2

facebook：App Name：Everyplay
App id：182473845211109
facebook SDK version 6.2.2

everyplay setting：iOS enable is checked.
Android enable is checked.
Chient id is checked with the same data in website
Chient secret is checked the same data in website
Redirect URI：https://m.everyplay.com/auth

Should I type a URL in "URL scheme suffix" in facebook settings？how to define ？