While creating a ranger character, if you select humanoids as your favored enemy, you get to pick two sub-categories (e.g. werewolves, dwarves, goblinoids, lizardfolk, etc).

Warforged does not appear in this category.  Are they constructs???  If not, this might be a bug in the UI if you have Eberron content selected.

I’m thinking about a blade runner type character...

The favored enemy is missing a few humanoid subtypes. You may just have to make a note.

This issue persists almost two years later