I had to install pipx to get kasa to install on my OS.

kasa --host 172.16.64.114 on
Discovering device 172.16.64.114 for 10 seconds
Raised error: 'No time zone found with key MST7MDT'

Bottom line Issue:
ZoneInfoNotFoundError(f"No time zone found with key {key}")
zoneinfo._common.ZoneInfoNotFoundError: 'No time zone found with key MST7MDT'

Environment:
OS : Debian GNU/Linux 13 (trixie)
OS Kernel : 6.12.47+rpt-rpi-v8