WordPress Access Denied with My Browser

From one day I found that I can’t access my site regularly. When I try to visit my site with my browser, I tried the follow browser mode:

Chrome with Normal Window
Chrome with Incognito Window
Edge with Normal Window
Edge with Private Window

in this browser windows, the site would shows Access Denied in title at once, then back to normal, and the site would displays as text only, without any images, CSS or any other content. But when you login to Admin page, everything would displays right.

In F12 developer mode, the console says it met failed to load resource: the server responded with a status of 500 (Request Blocked).

Then I try visit my site in the same laptop with follow ways:

Edge with Windows Defender Application Guard (You may think it as a new Private Window with higher level)
Edge in Windows Sandbox

in this browser windows, the site would shows without any problem.

I had guessed it would be something, plugin or any other block me with my normal browser. I tried to stop all the plugins I run but it still denying access with my browser.

So I ask help to analyse what would cause this problem, that my site block me and my browsers.

The plugin I am using:
2em
Akismet Anti-Spam
All in One Webmaster
All In One WP Security
Categories Images
Ecko Blocks
Ecko Plugin
Envato Market
Gutenberg
Jetpack 由 WordPress.com 出品
Justified Gallery
Meta Tag Manager
Page Links To
Regenerate Thumbnails
Schema
SSL Insecure Content Fixer
WP-Optimize – Clean, Compress, Cache
WP-PostViews
XML Sitemap & Google News
Classic Editor