You can set the same SSID and password in access point mode. This is a help guide http://www.tp-link.com/en/faq-1199.html

If you click three lines on the top left on the home screen of Kasa, do you see your account name? Maybe you can login from another phone.

Go to firmware update on Kasa to check if your bulb can be upgraded.

UncleJohnsBand wrote Google play has 1.8 as most current... https://play.google.com/store/apps/details?id=com.tplink.kasa_android Okay, good to know. Can you login the 1.8 version?

What's the model number of your product? Some product has extender mode. If it's just a wireless rotuer, 1. you can configure the tplink as a secondary router. Plug that cable from your Verizon...

Can you downgrade the firmware version? Anyway, this is a serious issue, I think you can report to the tplink support.