Alright, I have A solution, I was playing on PC, saw the train station cutscene, didn't even skip it, I went to korbus but he wouldn't talk because it was Friday, besides that I had no relevant quest log so I played a bit, completed the "a winter mystery" quest that I forgot to do just in case it was that, it didn't fix anything until I found someone saying they fixed it by manually flipping the flag in the save files, so I closed the game, went away from the PC to do something else and completely forgot what was doing, so when I came back I launched the game again and went to the train station again bc I was playing SVE and wanted to talk to Susan and then the train station cutscene triggered again and after that the dark talisman mission was on my quest log, went to korbus again bc it was Wednesday at that point and he opened the bug place for me