I am getting a crash on startup:

310.919 Error ModManager.cpp:1514: Failed to load mod "deadlock_stacked_recipes": deadlock_stacked_recipes/data-final-fixes.lua:38: ...ked_recipes__/mods/CompressedFluids/data-final-fixes.lua:29: attempt to index field '?' (a nil value)
stack traceback:
...ked_recipes__/mods/CompressedFluids/data-final-fixes.lua:29: in function 'MakeSubGroup'
...ked_recipes__/mods/CompressedFluids/data-final-fixes.lua:266: in function 'parse_recipes'
...ked_recipes__/mods/CompressedFluids/data-final-fixes.lua:289: in main chunk
[C]: in function 'require'
deadlock_stacked_recipes/data-final-fixes.lua:38: in main chunk
stack traceback:
[C]: in function 'require'
deadlock_stacked_recipes/data-final-fixes.lua:38: in main chunk
310.923 Loading mod core 0.0.0 (data.lua)
313.475 Checksum for core: 3692526182
313.584 Error ModManager.cpp:1514: Error in assignID: recipe-category with name 'crafting' does not exist.

Source: default (utility-sprites).
313.698 Initial atlas bitmap size is 16384
313.700 Created atlas bitmap 2048x560 [icon, not-compressed, mipmap, linear-minification, linear-magnification, linear-mip-level]
313.710 Texture processor created (2048). GPU accelerated compression Supported: yes, Enabled: yes/yes. Test passed. YCoCgDXT PSNR: 35.83, BC3 PSNR: 33.82
313.787 Parallel Sprite Loader initialized (threads: 11)
314.069 Sprites loaded
314.099 Generated mipmaps (5) for atlas [0] of size 2048x560
314.099 Custom mipmaps uploaded.
314.102 Factorio initialised
314.109 Mods to disable:Failed to load mods: deadlock_stacked_recipes/data-final-fixes.lua:38: ...ked_recipes__/mods/CompressedFluids/data-final-fixes.lua:29: attempt to index field '?' (a nil value)
stack traceback:
...ked_recipes__/mods/CompressedFluids/data-final-fixes.lua:29: in function 'MakeSubGroup'
...ked_recipes__/mods/CompressedFluids/data-final-fixes.lua:266: in function 'parse_recipes'
...ked_recipes__/mods/CompressedFluids/data-final-fixes.lua:289: in main chunk
[C]: in function 'require'
deadlock_stacked_recipes/data-final-fixes.lua:38: in main chunk
stack traceback:
[C]: in function 'require'
deadlock_stacked_recipes/data-final-fixes.lua:38: in main chunk

Mods to be disabled:
• deadlock_stacked_recipes (1.1.5)

Can you please give me a save so I can sync my mods with yours.

Sure: https://drive.google.com/file/d/1IFBCv9kix-sRTk0qTuZlWuJD1JF_l527/view?usp=sharing
(Good luck. I added... a few)

200+ is a few

RealisticFusionPower was the problem, hope I have coded past the issues now.

Thank you! Also, the few was sarcastic. I accepted that I am crazy ages ago.

I regularly play maps with 50+ mods, the problem is trying to work out sometimes which mod is a cause of a desync or breaking other mods