With the following mods:
Custom Stage API
Mod config menu Pure
Co-op Hud+
MiniMapi
EID
Enhanced Boss Bars
Damn, Fiend Folio Reheated


If you play local co-op with 2-4 players, and someone dies, the hud disappears and this gets traced:
"MC_POST_RENDER" from "Co-Op HUD+" failed: ...0/ffscripts/customhealthapi/library/masks/initialize.lua:158: attempt to index a nil value (local 'data')
Stack Traceback:
...0/ffscripts/customhealthapi/library/masks/initialize.lua:158: in function 'GetRedHealthMask'
...440/ffscripts/customhealthapi/reimpl/renderhealthbar.lua:81: in function 'GetCurrentRedHealthForRendering'
...th/mods/co-op_hud+_3229942849/coopHUDplus_objs/heart.lua:314: in function at line 308
...th/mods/co-op_hud+_3229942849/coopHUDplus_objs/heart.lua:165: in function 'new'
...h/mods/co-op_hud+_3229942849/coopHUDplus_objs/player.lua:44: in function 'update'
...irth/mods/co-op_hud+_3229942849/coopHUDplus_objs/hud.lua:94: in function at line 63

If I disable fiend Folio it works as intended.
Otherwise, amazing mod! Thank you for your time mate.