Laplacian and Sobel Functions in open cv are not working properly

Question

I am trying to run the Laplacian and Sobel Function to test the edge and gradients of the video streaming but while running the mentioned below code

import cv2
import numpy as np

cap = cv2.VideoCapture(0)

while(1):

    # Take each frame
    _, frame = cap.read()
    hsv = cv2.cvtColor(frame, cv2.COLOR_BGR2HSV)

    lower_red = np.array([30,150,50])
    upper_red = np.array([255,255,180])

    mask = cv2.inRange(hsv, lower_red, upper_red)
    res = cv2.bitwise_and(frame,frame, mask= mask)

    laplacian = cv2.Laplacian(frame,cv2.CV_64F)
    sobelx = cv2.Sobel(frame,cv2.CV_64F,1,0,ksize=5)
    sobely = cv2.Sobel(frame,cv2.CV_64F,0,1,ksize=5)

    cv2.imshow('Original',frame)
    cv2.imshow('Mask',mask)
    cv2.imshow('laplacian',laplacian)
    cv2.imshow('sobelx',sobelx)
    cv2.imshow('sobely',sobely)

    k = cv2.waitKey(5) & 0xFF
    if k == 27:
        break

cv2.destroyAllWindows()
cap.release()

I am facing the error using this problem, I though search from google also and trying to degrade the version of OpenCV 4 to OpenCV 3 and which is also not working on the laptop and facing error

Traceback (most recent call last):
  File "C:\Users\Misha\Desktop\test\CV\Edge Detection and Gradients.py", line 24, in <module>
    cv2.imshow('laplacian',laplacian)
cv2.error: OpenCV(4.0.0) C:\projects\opencv-python\opencv\modules\highgui\src\window_w32.cpp:1230: error: (-215:Assertion failed) dst.data == (uchar*)dst_ptr in function 'cvShowImage'

Any kind of useful advice on this will be a great help.