@njeaton 

Try first reinstalling your app, and also testing on another smart phone if possible.

What devices do you have and which did you reference when making your smart actions events?

@Tony Thanks for your response.

I have tried reinstalling the app several times. I have an iPhone. I can't test on another.

I have set up Smart Actions with TP-Link smart bulbs (KL110, LB100) and a smart switch (HS200)

@njeaton 

One thing I forgot to mention is that the smart actions were enabled by updating the firmware of the devices.

Tap on the top left icon menu in Kasa, then go to settings, then go to firmware upgrade. Do you have updates for your devices? If so, update all of them and then create your smart actions again.

If there is no firmware update, please delete one of the bulbs, then factory reset it (turn switch off and on five times). It will blink three times after if the reset worked, now add the bulb back and create a smart actions for it.