Keeps stopping – Auto Captions: Video Subtitles Review

Why does it keep stopping that’s annoying. And plus it loads so slow now. It never used to act like this. And every time I do something to my video, it just stops. And, when I try to add a video sticker to my video (FROM YOUTUBE) it just says “Unsupported video format”. Honestly, please fix these bugs! I’m just trying to be an editor and your ruining it for me.
Review by Pumxin on Auto Captions: Video Subtitles.