I got this too. If you look closely, there is a space after the slash between faces and Blacksmith. That's likely what is causing the error.
This can't be solved on the user end by adding/renaming a file (like many missing file errors can), as it is impossible to start a filename with a space.
At first I thought it was the memory error which causes some interactions to glitch like that but it turns out that the blacksmith is completly broken. I've tried all the fixes I could think off (in-game and with the files), so I think we can add the blacksmith to the "Shits that don't work at all" list