Your options
Navigate to and select Blog from menu > “my articles” > find the post you want to update > “Edit” > update article > save to republish updated content.
Navigate to and select Blog from menu > “my articles” > find your article using the search bar > tap your name on article > this opens your Timeline. Now using filters (if too many) find your article > on the article select the top dropdown menu > select “Edit” > update article > save to republish updated content.
Navigate to your timeline > find your article using the filters (if too many) > on the article select the top dropdown menu > select “Edit” > update article > save to republish updated content.
If you are still unable to update post/article, get in touch with resolution centre.