#Emacs has decided to mess with me today -- suddenly getting an error every time I try to reply to a message in Gnus that contains emoji, or save a text file with emoji "No such file or directory, MULE-ethiopic". Doesn't matter how long you've been using it, some days it just decides it's going to teach you something new.
@johns That file should be in etc/charsets underneath your Emacs installation directory