[Alpha 5] Workers wont promote

Title: Workers wont promote

Summary: I had just made my second “Wooden Practice Sword” when I was unable to promote anyone to it. I tried doing it by clicking the sword, from the citizen menu and manually by clicking on the citizens. I eventually got an error, which I will post below.

Steps to reproduce: (maybe) Create a Wooden Practice Sword and assign someone to it. Create another one and get and nothing happens.

Expected Results: Citizen took the sword and got promoted to footman

Actual Results: Big AI error and nothing happened with the promotion

Notes: The worker starts walking towards the sword and then walks back

Versions and Mods: Alpha 5 on Steam with no mods.

System Information: Windows 8 64-bit, Intel i5 processor and GeForce GTX 750 Ti.