the crash is related to warheads but does not happen unless true nukes continued And schall tanks is enabled i do not know if it is the fact that you need schall suite patches mod to make schall tanks not crash but removing either true nukes continued or schall tanks and this crash below no longer happens

warheads and schall tanks do not crash

Failed to load mods: Warheads_Continued/prototypes/weapontype-sanitise.lua:243: attempt to index field 'ammo_type' (a nil value)
stack traceback:
Warheads_Continued/prototypes/weapontype-sanitise.lua:243: in function 'action_creator'
...ontinued__/prototypes/warhead-weapontype-combination.lua:126: in function 'combine'
Warheads_Continued/prototypes/generate-all.lua:24: in main chunk
[C]: in function 'require'
Warheads_Continued/data-updates.lua:5: in main chunk

Yep, it's a thing with the old compat patches for Schalls. I have gotten multiple reports and I will work on a fix after my vacation, alas in about 2 week

neat

Did you get a chance to look into this? It still crashes with schall tanks.

Development has been slow as I have been working myself through finals irl and an ongoing court case. I haven't looked into it yet sadly, but it's among my top priorities for the next update