iMovie 10008 Error

So I am putting together a little project that is under 2 minutes long on imovie. But when I try to export it I get the error code of 10008. I have read other article and discussions posts that say edit out the black points in the movie and it will export correctly. But when I try to cut out the black parts on my film it will just move positions. So instead of being cropped out of the film it will be moved to the transition "cross fade" I put in. I restarted my computer to see if that was the issue and that didn't solve and I also duplicated the work to see if that would help and it didn't.