An error described below pops up when launching the game:
Failed to download these mods:Krastorio2/data-final-fixes.lua:90:...rio2__/compatibility-scripcts/data-final-fixes/angels.lua:2: ility-scripcts/data-final-fixes/angels/angelsfining.lua:29: attemtp to index filed '?' (a nil value)
stack traceback:
...ility-scripcts/data-final-fixes/angels/angelsfining.lua:29: in main chunk
[C]: in functiom 'require'
...rio2__/compatibility-scripcts/data-final-fixes/angels.lua:2: in main chunk
[C]: in functiom 'require'
Krastorio2/data-final-fixes.lua:90: in main chunk
stack traceback:
[C]: in functiom 'require'
...rio2__/compatibility-scripcts/data-final-fixes/angels.lua:2: in main chunk
[C]: in functiom 'require'
Krastorio2/data-final-fixes.lua:90: in main chunk
stack traceback:
[C]: in functiom 'require'
Krastorio2/data-final-fixes.lua:90: in main chunk

Mod's to disable:
Krastorio2(0.9.21)

Factorio v. 0.18.x-Laset 0.18 Experimental
Krastorio 2 v. 0.9.21

Strange but true, the fix is deleting and reinstalling angel's mods (as well as deleting mod settings). This is a probability a base game bug in the configurations, anyway, no mod bug here.