Why does my shotcut stop working at 41%

[shotcut]

You are running out of memory. There is a post almost every day about this with similar answers. You could search and read a little. Here is the most recent

Rendering problems

Maybe you are running out memory: reboot start shotcut and nothing else open the project but do not play it export and wait for it to finish before starting anything else Also, I see you are using the 32-bit version. It is less stable, can only use up to 3GB RAM, and has been discontinued. So, limited memory is the most likely problem. Use 64-bit if you can. Otherwise, reduce tracks if you can. 4 tracks of 1920x1080 is a lot for this 32-bit program.

I cannot make every project possible use a small amount of memory, and 32-bit which you are using is too limiting. That is one reason why it is discontinued. With that said, in the newest version 20.11.25 we made some changes to reduce memory usage and also show a dialog when the system is running low on memory. Some ways to reduce memory in your project is to reduce the number of tracks or resolution, not use parallel processing (already turned off in 32-bit), and restarting shotcut before exporting.