In some cases the course blocks API was returning a dict without a 'children' key, which was causing a traceback. If the course blocks API has no children, that's IS a problem, but still better than erroring out due to a KeyError. AA-1267
In some cases the course blocks API was returning a dict without a 'children' key, which was causing a traceback. If the course blocks API has no children, that's IS a problem, but still better than erroring out due to a KeyError. AA-1267