Please try the following options –

Android phone or tablets

• Delete special characters from your chromecast device name such as emoji’s or apostrophes as Sony LIV app cannot recognize special characters
• Ensure that your device and Chromecast are connected to same Wifi
• Update to recent version of Chrome
• In case if your router, modem or getaway is set to multicast routing, kindly refer to your router, modem, or getaway owner’s manual or manufacturer for setup instructions

Make sure you are having latest Sony LIV app version installed on your device -

a. Android minimum version support: 4.4 or above

b. iOS minimum version support: 11.0 or above