I just moved places and am trying to setup my Chromecast to a new wifi. The setup is good until it's time to connect to the wifi.
There will be a pop-up message that says that I've lost connection or that I can't communicate to the Chromecast.
I've already done a factory reset and tried unplugging the Chromecast, waiting, and plugging it back in. I know it's not the network because it's running fine on my other mobile devices. It's also connected to the wall outlet so there's no power issue. I've also stood right next to it during setup and I still get the same message.
It sounds like you've already tried some of these steps but including them in full. Let us know how you get on!
If none of the steps above help, factory reset your Chromecast and then retry setup. You may also want to try setup using a different phone or tablet, just to test, if you have one.
Perfect! Happy to hear that your issue was resolved and @David_K was able to help! It looks like we can consider this one complete, so I will lock the thread shortly unless I can help out with anything else.