I have resolved my issue. Switches are now working. I had to actually DELETE my VPN off my phone, then the switches hooked up right away. Apparently just turning it OFF was not sufficient. Then I...

@B.Will My security is set at WAP2/3 personal. Still no good.

I switched my internet to fibre yesterday, so got a new router, password, and network. Every device in my house hooked up to the new network - no problems...except...my 4 KASA light switches. I have...