Hi @shyguy, welcome to the Forum!
Your error looks like an installation error. My suggestion would be to do the following:
1 - Create a new virtual environment with Conda
2 - Install PennyLane using python -m pip install pennylane
3 - Install cuQuantum using python -m pip install cuquantum-python
4 - Try running the simplest code possible:
import pennylane as qml
dev = qml.device("lightning.gpu", wires=1)
@qml.qnode(dev)
def circuit():
qml.PauliX(0)
return qml.expval(qml.PauliZ(0))
circuit()
If you have any installation questions about cuQuantum you can check their installation instructions on their website.
If you still get an error could you please share your entire error traceback?