Thank you @marcanor – I’m not tech savvy so it’s taken me a bit of time to try your suggestions. I cleared caches and cookies. Then I located the Javascript console and there are errors. I’m unable to paste the screenshot, so I’ll type them in:
SytaxError: Invalid regular expression: nothing to repeat
f (anonymous function) – wp-seo-post-scraper-510.min.jus:3
ReferenceError: Can’t find variable: YoastSEO
f (anonymous function) – wp-seo-featured-image-510.min.js:1:1879
f i – load-scripts.php:1002
f fireWith – load-scripts.php:1039:94
f ready – load-scripts.php:1105:110
f K – load-scripts.php:1112:105
I’m using WordPress 4.8.1. I hope this means something to someone. I also noticed that the little Yoast button on the top of the blog pages is gray. On the page with the list of all the blog posts, there’s the green light for the old posts, but the gray light for the new posts, but on the individual blog edit pages, all of the Snippet Editor preview has disappeared.
Thank you for trying to help me out on this.
Karen
