SystemError: <built-in function imread> returned NULL without setting an error [ WARN:0] global C:\Users\appveyor\AppData\Local\Temp\1\pip-req-build-j8nxabm_\opencv\modules\videoio\src\cap_msmf.cpp code example

#The syntax of cv2.imshow() is
cv2.imshow("windowname", image)
# First the name of the window, next the image itself.