I can not use the lantern

[Romulator]

If you have purchased the game on Steam, try a Steam File Integrity Check. Check Problem I here if you need help: https://www.frictionalgames.com/forum/thread-3754.html

If you do not have the game on Steam, try reinstalling it, or grab the update from here: http://www.frictionalgames.com/forum/thread-24334.html

If problems continue, follow Problem X in the first link.