[Getch]

Looks like you are missing human_managers.csv? The Readme has all the csv files that are required:

divisions.csv
games.csv
games_score
human_managers
leagues
league_history
players
players_batting
players_career_batting_stats
players_career_fielding_stats
players_career_pitching_stats
player_fielding
players_game_batting
players_game_pitching
player_pitching
players_value *
sub_leagues
teams
team_relations

* = Not in Readme, but it is used

I'd set up the game to only export those csv files, and then just upload them to the server after each sim.