ValueError: Error when checking input: expected conv2d_1_input to have shape about keras-flask-deploy-webapp HOT 3 CLOSED

# pre-process the image for classification
img = img.convert('RGB')
img = img.resize((28, 28))
# Preprocessing the image
x = image.img_to_array(img)
#x = np.asarray(img)
x = np.expand_dims(x, axis=0)
x = preprocess_input(x, mode='tf')

# classify the input image
(nt, weapon) = model.predict(x)[0]
return nt, weapon`