Atlas Skill Tree Bug

Hello, my atlas skill tree is bugged. I have a notification on the bottom of my skill tree, notifying me I have 4 available points. (I currently have 36/40 skill points allocated. However, I am unable to use them.

Of note, I was killing bosses on tier 15+ maps before I cleared out corrupted zones - and was rewarded for that. I assume this bugged the game out when I finally cleared my last corruption.

Check your other atlas trees, not just the middle one. Points are not universal.