Further troubleshooting found a third mod involved. Transport-drones
Disabling Bio_industries, Deadlock-stacking-crating-bobs, or Transport_Drones allows the game to load.
Mod list
base
Bio_Industries
deadlock-beltboxes-loaders
deadlock-stacking-crating-bobs
DeadlockStackingForVanilla
deadlock_stacked_recipes
informatron
stdlib
Transport_Drones