I can't seem to add an image to the novel https://www.novelupdates.com/series/when-a-fanfic-protagonist-transmigrated-into-the-original-novel/ I know the image isn't super nice but it's the one the author used. Evidence: http://www.jjwxc.net/onebook.php?novelid=2647008
did it gave an error message or something? if it is 'just not showing up', then that is normal. all uploaded images needs to be reviewed and approved by tony personally. so it might take some time, depending on how busy he is.