I'm getting the same. I thought I'd poke around with the Lua scripting and learn the ropes by converting some old macro events. I found that if I start a game as one of the 3 official types or 'Play a Mod', the Civ library seems to load OK, but if I choose 'Begin a Scenario', it ain't happening. I know that events.lua is being loaded from the scenario folder because any print functions show up in the Lua console. You can test this using the Sci-Fi game Lua events; compare starting a new game, saving a game and reloading, and saving the game as a scenario (in the Scifi folder) and launching. I just came here to post this after about 2 years away from the game, only to find a freshly minted version of the ToTPP same day.