I updated the mod and got the following error code
86.077 Script @all-the-overhaul-modpack/util/log.lua:7: DEBUG: Technology not found: floating-drill-mk3-technology
86.077 Error ModManager.cpp:1625: Failed to load mod "all-the-overhaul-modpack": ...e-overhaul-modpack__/compatibility/dredgeworks-fixes.lua:3: attempt to index local 'mk3Tech' (a nil value)
stack traceback:
...e-overhaul-modpack__/compatibility/dredgeworks-fixes.lua:3: in main chunk
[C]: in function 'require'
all-the-overhaul-modpack/compatibility/fixes.lua:8: in main chunk
[C]: in function 'require'
all-the-overhaul-modpack/data-final-fixes.lua:7: in main chunk
86.080 Loading mod core 0.0.0 (data.lua)
87.491 Checksum for core: 3215923532
87.535 Error ModManager.cpp:1625: Error in assignID: recipe-category with name 'crafting' does not exist.
86.077 Script @all-the-overhaul-modpack/util/log.lua:7: DEBUG: Technology not found: floating-drill-mk3-technology
86.077 Error ModManager.cpp:1625: Failed to load mod "all-the-overhaul-modpack": ...e-overhaul-modpack__/compatibility/dredgeworks-fixes.lua:3: attempt to index local 'mk3Tech' (a nil value)
stack traceback:
...e-overhaul-modpack__/compatibility/dredgeworks-fixes.lua:3: in main chunk
[C]: in function 'require'
all-the-overhaul-modpack/compatibility/fixes.lua:8: in main chunk
[C]: in function 'require'
all-the-overhaul-modpack/data-final-fixes.lua:7: in main chunk
86.080 Loading mod core 0.0.0 (data.lua)
87.491 Checksum for core: 3215923532
87.535 Error ModManager.cpp:1625: Error in assignID: recipe-category with name 'crafting' does not exist.

hello, + 1 same for me

+1, reverting to 1.8.20 seems to work. So it's specific to the 1.8.21 version.

for me the same

Thx for the report. It's fixed in 1.8.22.