Biomes You'll Go is not marked as a dependency. This results in a bunch of errors in the console about NoFileFound whenever the mod references Biomes You'll Go. The game launches fine w/o crashing, but should probably throw an missing mod exception. This is also the case for Macaw's Bridges - BYG.

Log: https://paste.ee/p/ExRoA

Also pardon the errors, I'm trying out a bunch of mods, for pack research.