Video playback of the whole project doesn't work

[Starfishcraft]

Commit Hash

Platform
Linux Debian

Summary
After working on the project for some time, I can't play the video. When I press the play button, nothing happens. The timeline cursor stays in one place.

Additional Information / Output

[MolnarSolutions]

Happens to me as well on debian.

Just curious, does trying to export the video show the progress, but then at 100% gets stuck and does nothing?
I have a file being output and everything, but trying to run it via mpv outputs:

[ffmpeg/demuxer] mov,mp4,m4a,3gp,3g2,mj2: moov atom not found
[lavf] avformat_open_input() failed
[ffmpeg/demuxer] mov,mp4,m4a,3gp,3g2,mj2: moov atom not found
[lavf] avformat_open_input() failed
Failed to recognize file format.

crashlog

I suspect there is a maximum file size that projects can reach before this issue arises, especially on graphically lower end devices.
I will test this on windows 10 on a computer with higher graphical specs and report back.