Problem: Teton Workshop Shift Knob install on 6th Gen 4Runner

Ive watched their install video a dozen times, I follow along every second of the way and do the exact same thing. And yet when I do it, the trigger knob won't depress and the softer won't shift at all. I have tried it multiple times. I've reached out to them and they said just make sure it's pushed down all the way. Tried that (before and after they said that) and NO DICE. Anyone also install this on their 6th Gen and have same issue or no issue? Tips? Clearly I am doing something wrong. This knob also works on 24 Tacoma and 24 Tundra. The install process is super easy and should be plug and play.