Can't enchant any armor in enchanting table

I was trying to enchant my armor and books in the newest snapshot survival, but enchants in the menu didn't show up.

I was expecting that my enchants will pop up in the right of menu. The item looks like it's not enchantable.

What actually happened was...:
As you can see in the screenshot, enchantments did not showed up in the right side of menu. I tried to enchant crafted and given armor or books but none of it worked.

Steps to Reproduce:
1. Put any armor or book in the enchanting table
2. You can see there are no enchants to choose