Furnance error

Put the summary of the bug you're having here
Iras trying to make buckets but for that I needed iron and when I tried to make it I couldn't use the furnace it got in the furnance menu but I couldn't select the place for the coal and neither the result place
What I expected to happen was...:
Describe what you thought should happen here
Melt iron
What actually happened was...:
Describe what happened here
Nothing
Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...get iron rock
3. ...put it in the furnance
4.... try to put coal