Burning Blu-rays from FCP not working anymore?

So I know I haven't done this in years, but I wanted to burn a blu-ray for my father for some home videos of his, and when I go to burn the Blu-Ray, not only does FCPX lock up by the end of it, and it says it's finished with the Blu-ray, but nothing works. The blu-ray is corrupt, doesn't play, has files on it, but won't play back on any blu-ray player, and when I put it back on the computer it sometimes acts like it's empty. it's all sorts of buggy. Is anyone else having issues with this or am I the only person using this feature in the US?

macOS 10.15.7
fcp 10.5.1

Try creating the disk image on the desktop and see if that works. Then burn the image to the disc from the Finder.