Game crashes on signboard

I've been wanting to put signboards so that people can see it. But everytime I begin typing, the game crashes. Please fix.

What I expected to happen was...:
That I could type on the sign normally.

What actually happened was...:
The game crashes and that when I go back, the signboard is gone.

Steps to Reproduce:
1. Place a signboard anywhere.
2. Start typing
3. Game crashes