C4 W4 A1 Error in who_is_it function

I am trying to test the who_is_it on an other input image then the provided images in the notebook but i doesnt go well please help.

1- i tried to append a new dictionary item with encoding function of my new image.

2- i tried to use who_is_it function on another img for the same person but the result is not what intended to be.

what i’am missing ?

thanks for helping.

Could you please update the post with the images tried?