Store a beast

I can't store a beast.

I tried this steps:
1. Retrieve some Chaos Orbs
2. Talk to Einhar in the Menagerie -> click Buy Items
3. Buy as many Bestiary Orbs as you need
4. Open the Bestiary panel (H by default on PC)
5. Use Ctrl+F to find the beast you're trying to sell
6. Right click an empty Bestiary Orb
7. Left click the beast
8. Left click a spot on your inventory

EDIT:
You can store it, if the orbs aren't inside the backback. If orbs are inside the backpack, you cant store the beasts.

omg thank you! I did NOT figure out what I was doing wrong