The image in the folder is accidentally named "bj 2-10" instaed of "bj 2-10-1" which causes the error. It should work if you rename the image manually. This will be fixed with the next build. Someone did tell me about this already, but I am always grateful to hear about every bug or typo anyone finds. So I thank you for reporting it and hope you will continue to do so if you notice anything else.
For now, I wish you a Happy New Year and hope you enjoy the future builds of the game.