We probably didn't catch this in Craft Corner originally bc another mod probably has Greenhouse Config up to date, but the included Greenhouse Config in Enchiridion 0.3.0-pre.1 is a bugged version and causes a crash due to lack of info in a Class Tweaker.
You also may wish to update this version due to the config data fixer not functioning properly on this old version.
Had an out of date GHC installed in my env. Issue is invalid.