Schematic not working

## Some information
Operating system: Windows 10
Java version: No idea, java is deciding to be weird and not open. I last updated it sometime in the last 6 months I think.
Minecraft version: 1.12.2 Impact
Baritone version: It's 4.8.3 1.12.2 Impact. I don't know what Baritone version it would be.
Forge mods (if used): None

## Exception, error or logs
Please find your `latest.log` or `debug.log` in this folder and attach it to the issue

Linux: `~/.minecraft/logs/`

Windows: `%appdata%/.minecraft/logs/`
[debug.log](https://github.com/cabaletta/baritone/files/4242146/debug.log)
[latest.log](https://github.com/cabaletta/baritone/files/4242148/latest.log)

Mac: `/Library/Application\ Support/minecraft/logs/`

## How to reproduce
Add your steps to reproduce the issue/bug experienced here.

Save an area of land in Worldedit as a schematic then try to load it using baritone.

## Final checklist
- [x] I know how to properly use checkboxes
- [x ] I have included the version of Minecraft I'm running, baritone's version and forge mods (if used). (Sorta)
- [x ] I have included logs, exceptions and/or steps to reproduce the issue.
- [x ] I have not used any OwO's or UwU's in this issue.

Start by reproducing the WorldEdit schematic workflow in Minecraft 1.12.2 with Impact and review the attached debug.log and latest.log files. Compare the logs with the schematic-loading steps to identify the failure; done means the saved schematic loads successfully through Baritone or the issue is narrowed to a specific reported error.

Written by the indexing model from the issue text.