Invalid Installation Detected Your game installation is corrupted or otherwise invalid This can happen if your copy of the game is pirated, or if you copied a pirated copy over your legit install If your copy of the game is pirated, please purchase the game HERE . If your copy of the game is not pirated, please do a clean install . If those don't help, ask for support in the #support channel in BSMG . If you used to have a pirated version but have since bought the game: You will need to restart Mod Assistant after changing to the legit install.