when I want to post some videos and pictures together, I always receive "sorry,there is a problem", I don't know why it occurs sometimes, it is ought to be right for me to post them together, right? and now I can't even post a video. Plus, i can't tap the "next step" when I change the cover or trim the videos, please fix the problems! I enjoy recording my memories on my account and sorry for needing you to help me fix these two problems, thanks a lot !