facebook instantgame 广告无法展示

我也碰到问题了，通过messger里面打开游戏，然后getRewardedVideoAsync，直接代码走到catch里面,err没有任何信息，预加载失败，设备是iphone6
FBInstant.getRewardedVideoAsync(
'myId',
).then(function(rewarded) {
// Load the Ad asynchronously
preloadedRewardedVideo = rewarded;
return preloadedRewardedVideo.loadAsync();
}).then(function() {
console.log('Rewarded video preloaded');
self.isSupportRewardAPI.string = 'Rewarded video preloaded';
}).catch(function(err){
console.error('Rewarded video failed to preload: ' + err.message);
self.rewardError.string = 'Rewarded video failed to preload: ' + err.message;
});