Hello   @Jesus23 

Thank you for reaching out to the community. 

Upon checking your account register the community, the kasa smart devices seems are offline. 

Please try to reboot your kasa device and see if devices are online remotely in the kasa APP when phone is on LTE mobile data 

• Reboot plug (unplug and plug back in)

Kasa smart plug is only a relay to provide power or cut off power to the connected device, so it should not affect your Xmas tree light as long as the power is within its max load. 

Sorry to hear what happend Christmas light as this product is of a different company, I suggest reaching seller or their support to ask if the check the warranty. 

Hope this helps!