Hello @cata_bun 

1. When factory reset bulb , try to turn off/ on slowly has one sec interval every time and see if bulb flashes 3 times. Kasa bulb will broadcast default SSID  'Kasa Smart Bulb_XX' after a successful factory reset 

How to reset TP-Link Kasa smart bulb?

2.  If you could see the Kasa default SSID, later follow APP instructions to set up the smart device, when app guides to connect to Kasa_Smart_ XX SSID

iOS: Go to the Settings page, click on the Wi-Fi  to connect to the Smart device’s Wi-Fi manually, then go back to app to continue set up
Android: Android phone will look for smart device automatically, if not or could not find  device,  manually connect to Smart device's Wi-Fi, go back to APP and continue set up.

• Turn off VPN