Hi Hung,
Resolved
Solution: I use the sg optimizer plugin, I excluded these two Javascript from the asynchronous loading of the JS files:
1. /plugins/contact-form-7/includes/js/scripts.js
2.https: //www.google.com/recaptcha/api.js? Render = 6Lc1yMoUAA ……..
and now it works properly.
I just hope it filters spam properly
Thank you