Homepage now content the code “meta name=’robots’ content=’noindex,nofollow’ /” (< removed). From Googling, it appears that this code should be added when I visit the Privacy section of WordPress and select “I would like to block search engines, but allow normal visitors”.
However, my site is selected as “I would like my site to be visible to everyone, including search engines (like Google, Bing, Technorati) and archivers”.
I also understand that by default, WordPress chooses the first option, blocking search engines. I think that at some point during the restore to a previous version, WordPress has got stuck in the blocking search engine mode. Changing privacy is having no affect on the code
<meta name=’robots’ content=’noindex,follow’ /> noindex,follow’ means google spider not index the page.
 

Solution:

The setting is stored in the options table under the key blog_public, the value is either 0 or 1
Update value blog_public 0 to 1

See in attachment