Look if your date and time is set correctly
I had similar issue. Even restarting device did not work. But restart Wifi on tv device did solve the problem for me.
Try connecting to a different Wi-Fi band (ie. 2.4G instead of 5G or vice versa).
Also if you're using a single SSID for both 2.4G and 5G try creating separate SSID's for each (ie. Wireless_24G and Wireless_5G). Some devices don't work well with the band steering tech in some modern and mesh routers.
Hi there, Did you guys solve the issue ? I just update my android tv from 9 to 10 then the wifi stopped working, I can connect through my cell phone hotspot but I cannot connect to my router.
Try restarting your android tv, if that doesn't work restart your wifi router.