Druide able to wear metall armor
 

I submittet a bug but still unsure how it should be handled anyway.
I was able to create a druide and equip him with a breastplate. That should not be possible or at least provide a warning.

But what about studded leather? Is this considered metall or not?

Wielding metal armor or shields is covered by the "anathema" rules in the druid section. The rules are unclear about how many times you have to perform such an act to lose your benefits. So you could wear metal armor for a certain amount of time.

I don't think HL is built to support tracking your level of anathema.

Anathma performance is kind of on players to handle and determine. We don't want to tell you that you can't put on a breastplate, because you can, but it's up to the players/DM to determine if their anathma has been violated.