Colormath function delta_e_cie2000() not working properly

Question

My goal is to calculate the difference between two RGB color values. When I run this example:

from colormath.color_objects import sRGBColor, LabColor
from colormath.color_conversions import convert_color
from colormath.color_diff import delta_e_cie2000

# Red Color
color1_rgb = sRGBColor(1.0, 0.0, 0.0);

# Blue Color
color2_rgb = sRGBColor(0.0, 0.0, 1.0);

# Convert from RGB to Lab Color Space
color1_lab = convert_color(color1_rgb, LabColor);

# Convert from RGB to Lab Color Space
color2_lab = convert_color(color2_rgb, LabColor);

# Find the color difference
delta_e = delta_e_cie2000(color1_lab, color2_lab);

print ("The difference between the 2 color = ", delta_e)

I get the error:

AttributeError: module 'numpy' has no attribute 'asscalar'

I tested it also on Google Collab to figure out if it was a configuration problem of my enviroment but I got the same error. I remember it was working properly before one month I think. Any clue what is happening or at least how to measure the delta_e_cie2000 distance between two colors?