My Animation montage not showing in game!

Hello all, I had a problem with the animation montage not showing in-game when click. Them both just standing still like no action is taken instead of stealth the opponent. For a few sec, the enemies disappear which is dead but didn’t show. This carries me for almost 3 days now and I can’t found any solution to it. pls, do help me and give me an assist. I really wanted to work. I follow one of the videos on youtube:

Here some pictures of my takedown:
First is main character events:

This is the AI events:

Do you have a default slot in the animation blueprint? Montages will not play without one.

I don’t think I have one in the default slot. I only copy what shows in Matt video on youtube. Stealth Takedown / Assassination From Behind AI - Unreal Engine 4 Tutorial - YouTube
I have the takedown animation for both the main character and the AI as following the video.

Also here’s the video of my probelm.https://drive.google.com/file/d/1G6JL6_msRZzV661hKoG3KYCwEW-71Nn5/view?usp=sharing

Nevermind, an expert of Unreal solve my issues.