"AP Isolation Is Enabled" Error Fix for Chromecast
The Google Chromecast does its best to determine anything that may cause it a problems when you go to cast later, including when AP Isolation is enabled.
This guide will walk you through the basics of getting this problem fixed.
1 Disable AP Isolation
"AP Isolation" or "Wireless Isolation" is a setting available on some home routers that makes it so each wireless device is not allowed to talk to other computers on the same network.
In most cases, this is enabled on public networks (such as hotels, conference centers, coffee shops, etc.) to protect the guests of the business from someone attacking on the free Wi-Fi. In most cases, a 'Guest' network provided by a home router will have the same option enabled as well.
Each router is different, and there are hundreds of models by dozens of manufacturers available. Check your router's settings, and make sure "AP Isolation" or "Wireless Isolation" is not enabled.