giqui I think this one's for you. Looks to be some kind of filename path error, which is something I've never seen or heard before.
It's no bother!
I hate to be the bearer of bad news, but cheating and giving yourself the extra wood is what caused the issue. There's a point where you're supposed to run out of wood to pick up (Ella gives you a notification when you walk on the ground floor once you've used enough) and you go talk to Phoebe to start the second half of the quest. Giving yourself that extra wood skips activating the second part of the quest, so now different parts of the game think you're at different points in the story.
I'd offer to fix it manually for you, but that section of the game is really fiddly with how it's scripted, so even if I fixed one thing, progression might still be bugged out somewhere else (what usually happens is people get to Extermination with only Ella in the party). The best thing to do would be to revert to an older save. If you don't have one from before you added the extra wood, I can get one for you.
See above. If that doesn't apply to you, or you're in a different part of the game, do you mind providing more details so I can give you more specific help?
There are two ways to do it (for now). One involves Beverly's side quest (talk to him at the docks after you find her (I forget if getting his trophy before finding her locks you out of this option; I think it does)) and the other is an option during final negotiations with Griselda (it should be Free Slave under Make Demands).