Can you clarify? Sense doesn’t “accept” wifi. It connects to an access point. If you’re having issues with the Kasa plugs, this appears to be related to network issues, not sense per the very long thread here
If Sense isn’t connecting it could be that your network has issues or that you have a defective device. Attempt to connect Sense to something like a wifi hotspot on your phone to test where the issue is.
I know a lot of people like Ubiquiti products, but as someone who deals with network equipment daily, they are the Ryobi of networking equipment. I rip the stuff out at any chance I get. As other’s have mentioned, buggy Ubiquiti firmware is a common cause of IOT failures on their equipment. This is why I suggest connecting to something other than a Ubiquiti product for testing.