please solve my error in your code I found it while testing

[Sowmya180801]

error Traceback (most recent call last)
Input In [10], in <cell line: 1>()
1 if name == 'main':
----> 3 trackMultipleObjects()

Input In [9], in trackMultipleObjects()
266 print(datetime.datetime.now())
267 cropped_image[i] = image[y1:y1+h1+25, x1:x1+w1+25]
--> 269 LPN[i] = detection(cropped_image[i])
270 print(LPN[i])
273 a = int(a) + int(1)

Input In [7], in detection(image_1)
2 height = 900
3 width = 700
----> 5 img = cv2.cvtColor(image_1, cv2.COLOR_RGB2GRAY)
6 car_image = cv2.resize(img, (width,height))
7 img_1 = cv2.resize(img, (width,height))

error: OpenCV(4.6.0) D:\a\opencv-python\opencv-python\opencv\modules\imgproc\src\color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cv::cvtColor'