@Mr-Moloch Next reset, you will find some areas of the module are dark even during the day. This is not a bug, Nocturne is coming as the main storyline progresses. In-character the shadow of one of the Tears of Selune has put part of the Arabel Tear into perpetual twilight, this began after the mysterious rain of golden coins a few days ago (these areas are already dark in game - but you may notice a major revision to one of these areas designed to make it more fun to explore there, the geography is not "new" assume the forest always looked like that geographically, but some features like the darkness are obviously new. Ask if any of this gets confusing though. :)
Mostly, the area was due an update anyway, and this was a good time to do so in a flavourful way that makes this forest feel very different from other forests in game. As always open to feedback and suggestions.