Error?

[G-Missaka]

Hi, I am trying to run the sample code and I am getting warning messages with some bad fittings:

Code:
from impedance import preprocessing
import matplotlib.pyplot as plt
from impedance.visualization import plot_nyquist
from impedance.models.circuits import Randles, CustomCircuit
import numpy as np
frequencies, Z = preprocessing.readCSV(r'C:/Users/llf1362/Downloads/exampleData (1).csv')
#frequencies, Z = preprocessing.readCSV(r'C:/Users/llf1362/Desktop/BatteryRobot/MainProject/src/main/utils/PStat/tests/GEIS.csv')
frequencies, Z = preprocessing.ignoreBelowX(frequencies, Z)
randles = Randles(initial_guess=[.01, .005, .001, 200, .1])
randles.fit(frequencies, Z, global_opt = True)
Z_fit = randles.predict(frequencies)
fig, ax = plt.subplots()
plot_nyquist(Z, fmt='o', scale=10, ax=ax)
plot_nyquist(Z_fit, fmt='-', scale=10, ax=ax)
#plt.legend(['Data', 'Fit'])
plt.show()

Message:
C:\Users\llf1362\AppData\Roaming\Python\Python37\site-packages\impedance\models\circuits\elements.py:170: RuntimeWarning: overflow encountered in tanh
Z = Z0 / (np.sqrt(1j * omega * tau) * np.tanh(np.sqrt(1j * omega * tau)))
C:\Users\llf1362\AppData\Roaming\Python\Python37\site-packages\impedance\models\circuits\elements.py:170: RuntimeWarning: divide by zero encountered in true_divide
Z = Z0 / (np.sqrt(1j * omega * tau) * np.tanh(np.sqrt(1j * omega * tau)))
C:\Users\llf1362\AppData\Roaming\Python\Python37\site-packages\impedance\models\circuits\elements.py:170: RuntimeWarning: invalid value encountered in true_divide
Z = Z0 / (np.sqrt(1j * omega * tau) * np.tanh(np.sqrt(1j * omega * tau)))
C:\Users\llf1362\AppData\Roaming\Python\Python37\site-packages\impedance\models\circuits\elements.py:81: RuntimeWarning: invalid value encountered in true_divide
z += 1 / elem
C:\Users\llf1362\AppData\Roaming\Python\Python37\site-packages\impedance\models\circuits\elements.py:82: RuntimeWarning: invalid value encountered in true_divide
return 1 / z
C:\Users\llf1362\AppData\Roaming\Python\Python37\site-packages\impedance\models\circuits\elements.py:170: RuntimeWarning: invalid value encountered in tanh
Z = Z0 / (np.sqrt(1j * omega * tau) * np.tanh(np.sqrt(1j * omega * tau)))
C:\Users\llf1362\AppData\Roaming\Python\Python37\site-packages\impedance\models\circuits\fitting.py:213: UserWarning: Failed to compute perror
warnings.warn('Failed to compute perror')

Fitting: