After constructing the Iron tower in Cape Trelawney, I got the Belle Epoque: The Malmelade Reve quest, but though it says to find a dancer near the iron Tower (which is in Cape Trelawney), the quest banner appears in the old world, and when I click on the quest message, the camera moves to the center of the ocean. Of course, I cannot find any of the dancers, neither in the old world nor Cape Trelawney.
Hey AilingTheo, thanks for reaching out and sorry to hear about the issue you've been dealing with.
As this particular issue does not look to be brought up already, for reproduction purposes, would it be possible for you to provide us with the following by any chance:
1. Video footage showing the issue (can upload it to any external video sharing website and send the link over to us to review)
2. Your game's save file, which by default should be located in %userprofile%\Documents\Anno 1800\accounts
Keep us updated and should you have any questions in the meantime, let us know!