This captcha solver returns error in Windows

[dragon0041]

File "D:\1_Projects\Air-Cargo\slice-solver\solver.py", line 17, in get_position
res = cv2.matchTemplate(background, template, cv2.TM_CCOEFF_NORMED)
cv2.error: OpenCV(3.4.2) C:\projects\opencv-python\opencv\modules\imgproc\src\templmatch.cpp:589: error: (-215:Assertion failed) corrsize.height <= img.rows + templ.rows - 1 && corrsize.width <= img.cols + templ.cols - 1 in function 'cv::crossCorr'

[eishirudo]

Yes how to solve this

[datrandom]

yeah, same

[Karolbrauza]

I have the same issue and in my case this was issue with __img_to_grayscale function because it not create tmp folder with sobel.png, after editing tmp_path to save sobel.png in current folder, everything works well. Try to edit __img_to_grayscale like this:
def __img_to_grayscale(self, img):
tmp_path = "./sobel.png"
cv2.imwrite(tmp_path, img)
return cv2.imread(tmp_path, 0)