fb instant articles

Am getting this error "(#200) Requires pages_manage_instant_articles permission to manage the object" while setting "Configure article styles". For more reference check below screenshot It will be great if anyone suggest me how to fix

I will pay very good

Hi everyone! It's been two or three years since i'm reading this awesome forum and props for all the great guys posting here! I don't post a lot but because i really wouldn't know what to teach to the members here as I'm not quite there yet but I figured why not ask the community opinion on that...