info: mounting content: effects.nx2
info: mounting content: env.nx2
info: mounting content: etc.nx2
info: mounting content: loc.nx2
info: mounting content: lua.nx2
info: mounting content: meshes.nx2
info: mounting content: projectiles.nx2
info: mounting content: textures.nx2
info: mounting content: units.nx2
info: mounting content: effects.scd
info: mounting content: env.scd
info: mounting content: loc_DE.scd
info: mounting content: meshes.scd
info: mounting content: mods.scd
info: mounting content: objects.scd
info: mounting content: projectiles.scd
info: mounting content: props.scd
info: mounting content: skins.scd
info: mounting content: textures.scd
info: mounting content: units.scd
and
debug: [uiutil.lua, function UIFile()] - Unable to find file:/textures/ui/uef/lobby/team_icons/team_4_icon.dds
(...)
warning: Failed to load mesh for blueprint /units/xsl0001/xsl0001_mesh
(...)
debug: [uiutil.lua, function UIFile()] - Unable to find file:/textures/ui/cybran/icons/units/ual5103_icon.dds
It appears that the game does not manage to load in some files from the base game. They are mounted, but perhaps they are corrupt. Could you verify the integrity of the files of the base game, via Steam?