Hey Chao,
I’ve looked into the issue – it seems that there was a reference in one of the theme’s included files which did not function properly in case of child themes. I’ve prepared a fix – please download this archive from my repository, unzip it, and upload into the following folder:
/wp-content/themes/Ikebana/includes/easy-fancybox
replacing the existing file.
Please let me know if this works!
Sincerely,
Andrew / Satori Studio