When installing Flare Stack you get the following error on startup.

5.501 Error ModManager.cpp:1745: Error while loading mod-setting prototype "5dim-cats-Flare Stack" (bool-setting): Invalid prototype name. Only characters A-Z a-z 0-9 _- are allowed.

I corrected the error with these changes using string.gsub to remove spaces.

Config.lua
line 16
local enabled = settings.startup["5dim-cats-" .. string.gsub(modname, "%s+", "")].value or nil

Settings.lua
line 8
name = "5dim-cats-"..string.gsub(modname, "%s+", ""),