I have summerize what is happening here, here thee wandering soul. FGO mod won't load, only blackscreen will appear at the moment. Worry not, or should you worry. There is nothing we can do until the generous admin (named Legend) fix this. I too feel anxious because I'm still progressing my story in london mist (not started it, just unlocked it). That the gist of it, may we meet again and continue playing this game. (Even my gacha is just so bad, damn why it has to be a gacha game curse you type moon)