Hi, Takano-san,
In PSTK docs, you can show it via Show-NaHelp cmdlet, ONTAP requirements are written as follows.
The Toolkit supports Data ONTAP 7.2.x, 7.3.x, and 8.0.x (7-Mode), and 8.1.0 (7-Mode and Cluster-Mode).
So, I think it's enable to run on 8.0.1.