Quick Fix - macOS WiFi Captive Portal Broken

Q: Why I got error on captive portal wifi?

A: Create a file my.shim.catalina.captivenetworkassistant.plist in ~/Library/LaunchAgents

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" \
"http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
 <dict>
  <key>Label</key>
  <string>my.shim.catalina.captivenetworkassistant</string>
  <key>LowPriorityIO</key>
  <true/>
  <key>ProgramArguments</key>
  <array>
   <string>open</string>
   <string>/System/Library/CoreServices/Captive Network Assistant.app</string>
  </array>
  <key>WatchPaths</key>
  <array>
   <string>/Library/Preferences/SystemConfiguration</string>
  </array>
  <key>RunAtLoad</key>
  <true/>
 </dict>
</plist>

Then run the command down below:

cd ~/Library/LaunchAgents

launchctl load my.shim.catalina.captivenetworkassistant.plist

launchctl start my.shim.catalina.captivenetworkassistant

Restart the macOS, the issue should be solved 👌

If you want to remove this daemon:

cd ~/Library/LaunchAgents

launchctl stop my.shim.catalina.captivenetworkassistant

launchctl unload my.shim.catalina.captivenetworkassistant.plist

rm my.shim.catalina.captivenetworkassistant.plist

The post I reference says that this issue fixed on 10.15.1 update, but I still got this error on 11.2.3 😭

Quick Fix is a series of my solution for some random problem

Reference

macOS Catalina WiFi issue — captive portal broken