I've been searching or a fix to this issue and nothing seems to be working consitently for anyone as far as ive been able to tell. The Export > Render Video function just doesnt work. I use a Mac at my work studio and a Windows machine at home and its the same issue on each computer. It's crazy to me that we are all now being forced to pay monthly for CC and there are so many issues and from what it seems like, this has been an ongoing problem for quite a while.