My Google Webmasters account has recently informed me:
Search Console has identified that your site is affected by 1 new index coverage related issue. This means that index coverage may be negatively affected in Google Search results. We encourage you to fix this issue.
New Issue Found:
Indexed, though blocked by robots.txt
What should I do???
Upon further research, it may have something to do with:
This is not a page on my site, and I don’t believe it was a page on the old CMS either.
Sorry to hear of the problem you are having.
Your shared page is not accessible for me and displaying 404 error.
You can fix this issue as described in the following page.