AP Isolation vs. Station Isolation: Which one should I use on my router?

Greetings!

I've run into a bit of a snag. I'm trying to get my Chromecast set up, but for some reason, it won't even show my Wi-Fi network as an option. Google suggests that I might need to check the AP Isolation setting on my router. I'm using a Linksys router (GO RT N150). Does anyone know the specific steps to adjust this? 🤷
Thanks in advance for any help you can provide! 🙂

https://support.google.com/chromecas.../3213084?hl=en
From what I can see, Google actually suggests turning AP Isolation off rather than enabling it 🤷

If I were you, I'd just log into the router and switch the Wi-Fi channel to something less crowded—most things seem to stay on channel 1 by default, I guess. Usually, the higher channels like 9, 10, or 11 are a bit quieter

You're absolutely right, that was my mistake. Does that mean AP Isolation is enabled by default, causing this interference?
How do I switch over to different channels? Could you walk me through that in a bit more detail... I'm really not an expert on this stuff. 🙂

http://www.youtube.com/watch?v=TocyFFtaXuo