Error message reads:

Failed to load mods: deadlock-beltboxes-loaders/prototypes/create_stack.lua:19: attempt to index field '?' (a nil value)
stack traceback:
deadlock-beltboxes-loaders/prototypes/create_stack.lua:19: in function 'get_group'
deadlock-beltboxes-loaders/prototypes/create_stack.lua:79: in function 'create_stacked_item'
deadlock-beltboxes-loaders/prototypes/public.lua:194: in function 'add_stack'
bztin/tin-recipe-final-stacking.lua:7: in main chunk
[C]: in function 'require'
bztin/data-final-fixes.lua:1: in main chunk

Mods to be disabled:
bztin

P.S. Fourth in a row. I would assume the rest are going to have the same issue, but I don't like making assumptions. We'll see what happens (knock on wood).