After Effects Render Stopping Halfway Through Rendering

Hello - I am trying to render a Quicktime .mov, but it keeps stopping the render at about 30s within the 3 min animation.

I have an imported .mov file (800 MB) and 9 layers of transparent lower thirds.

I try to export it with these settings:

I am using After Effects CC 2017 Version 14.1.0.57.

Details on the type of computer I am using:

I am not very tech savvy, so I am having a hard time figuring this out.

I have tried to Purge my disk cache, but that hasn't worked. I have also imported these files into a new project folder, that didn't work either.

I am 100% stuck! Help is appreciated!

Thank you

[Edited by moderator to remove Mac serial number - I'm not sure it matters, but just to be safe...]