strategyonly
C2C Supreme Commander
Ron's Standard Earth worked fine, just for the record. So it seems not all scenarios get this...
I turned on logging, and got the second result while trying Antmanbrooks 200 BC GEM scenario again, as the Romans (though I didn't go into worldbuilder, just immediately exited from the Esc menu and looked at PythonErr.log It showed this:
Spoiler :Can't find type enum for type tag LEADER_IVAN
Can't find type enum for type tag LEADER_KANGXI
Can't find type enum for type tag BUILDING_MALI_MINT
Traceback (most recent call last):
File "CvWBInterface", line 271, in applyInitialItems
File "CvWBDesc", line 1720, in applyInitialItems
File "CvWBDesc", line 1152, in applyCity
File "CvWBDesc", line 875, in apply
RuntimeError: unidentifiable C++ exception
ERR: Python function applyInitialItems failed, module CvWBInterface
Traceback (most recent call last):
File "BugUtil", line 692, in <lambda>
File "BugEventManager", line 577, in preGameStart
File "CvAppInterface", line 100, in preGameStart
File "CvScreensInterface", line 86, in showTechChooser
File "CvTechChooser", line 241, in interfaceScreen
File "CvTechChooser", line 256, in ConstructTabs
File "CvTechChooser", line 302, in DrawTechChooser
File "CvTechChooser", line 351, in placeTechs
AttributeError: type object 'CvPythonExtensions.WidgetTypes' has no attribute 'WIDGET_TECH_CHOOSER_ERA'
ERR: Python function preGameStart failed, module CvAppInterface
A key sign of this bug seems to be the whole "C2C version xx game options xx xx xx" popup not showing partway through the loading screen.
From the looks of the first line LEADER_IVAN, which is an extra leader, you need to first take out ALL the extra leadersheads, and any extra civs you have and then try again.