Build command crashing

I was experimenting with Baritone and I came across the build command. So I downloaded a schematic off of the internet. But when I did the command the game crashed. I tried downloading a small schematic but no change. If someone has a fix to this, help me.

Start by reproducing the crash with the build command and a small schematic, then capture the game's crash log and inspect the build-command entry point it identifies. Done means the crash is reproduced, its cause is addressed, and the same schematic no longer crashes the game.

Written by the indexing model from the issue text.