Hi Nilesh,
we encountered a couple of issues recently with the latest version of the Keysight IO Libraries.
Please have a look at the following forum issue whether installing an earlier version could help in your case as well.
Under the hood, we use pyvisa library to load interact with the VISA runtime library. It looks like that the necessary visa dll files are not correctly exposed or made available so that pyvisa cannot find it.
Please have a look at this and let us know if it can fix it.
Thanks and best
Axel