Shotcut Video Crashes Halfway Through

I compiled a few segments of video, and did a voice overlay. The first time I put this project together, the export would fail in Shotcut, so I completely restarted from scratch. The second time, it did export properly, but now it crashes about halfway through. I have tried this on multiple different computers running different operating systems (Windows 7, 10, and Ubuntu Studio), and have had no luck. YouTube also won’t allow it to be uploaded fully, as it stops after 68% processing. It is a 4 minute and 10 second MP4 video, size is 567MB. It is 1920 x 1080 at 30 frames per second. The video has been taken with my GoPro Hero5 Black, and I have uploaded many other videos just like this without issue. Any help is greatly appreciated!