How to solve this error message?

cv2.error: OpenCV(4.9.0) D:\a\opencv-python\opencv-python\opencv\modules\core\src\copy.cpp:71: error: (-215:Assertion failed) cn <= 4 in function ‘cv::scalarToRawData’ The specific error message is as shown above. Please help solve it for all the experts

please add resp. code snippet (MRE) and explain, what you are trying to do, ty.