The "ERR: [Site_label] [detected]" error in usually indicates that a quest or map site failed to generate its description properly. This typically happens when a mod responsible for a specific quest, faction, or world location is removed or updated mid-save, leaving the game unable to find the data it needs to display the text. Quick Fixes
The error typically looks like this:
Mod Removal: Removing a mod that added a custom faction or quest type mid-save leaves behind "ghost" references the game cannot translate. rimworld err site label detected new
Site object, call ValidateSiteLabel(SiteDef).label == null or label == "new" or label == "":
Based on your query "rimworld err site label detected new", this appears to be a debug log error or a modded notification from RimWorld. You’re asking me to produce a feature — meaning you want a game feature suggestion that either explains, resolves, or creatively builds upon that error message. The role-player: "Ah, yes, the ancient faction of the 'Err'