‘Type error: iterating over 0-d array’ caused by “from pennylane import numpy as np”

[RX1]

When I upgraded Penny, the following error was generated:

DeviceError: Observable QuadX not supported on device strawberryfields.fock

When I used this demo, the errors are occured: --------------------------------------------------------------------------- DeviceError Traceback (most recent call last) Cell In[12], line 5 3 var = var_init 4 for it in range(500): ----> 5 (var, _, _), _cost = opt.step_and_cost(cost, var, X, Y) 6 print("Iter: {:5d} | Cost: {:0.7f} ".format(it, _cost)) File d:\miniconda3\lib\site-packages\pennylane\optimize\gradient_descent.py:64, in Grad…