Did i miss something? can anyone explain what poor author that others are talking about.

I think they're talking about the saintess with silver/gray hair, that's in reality the author of the story in this webtoon. Not the real author I guess, but this world's the one of a novel, and that novel's author is the saintess.
I guess she got reincarnated or was transmigrated inside that role, when in reality she wanted to be the blonde empress 'cause she's obsessed with the tyrant emperor.