black screen after rendering

heyy 

my ae always crashes at a specific points and makes a sheep noise, whenever i try to play the video i rendered, the rendered video goes black after a certain transition. I've tried to reduce the effects and motion tile, I have also tried to render without the audio and i tried to delete some of my pc space too but it doesnt work.

if you know how to help then please let me know

I've been struggling with this for the past 4 days