Navigate to your local save folder (typically found under AppData\LocalLow\Ludeon Studios\RimWorld by Ludeon Studios\Saves ).

The error occurs when Ludeon Studios' sci-fi colony simulator fails to properly generate a world quest, map location, or event faction due to broken XML code, missing mod dependencies, or corrupted game data. Instead of crashing the entire game, RimWorld catches the missing text parameters gracefully and inserts a generic raw data placeholder string—such as ERR: [Site_Label] [detected] —directly into your active quest log or world map.

Navigate back one folder level to , then open LocalLow -> Ludeon Studios -> RimWorld by Ludeon Studios . Safely backup your Saves folder elsewhere.

A simple corrupted base game file or a minor update mismatch can cause text strings to break entirely. Open your and right-click on RimWorld . Select Properties , then click the Installed Files tab. Click Verify integrity of beta/game files .