Locking out Google bot services

I don’t think this IP belongs to google search bots

It may belongs to or it may not, anyway those request were blocked because access to the admin script admin-ajax.php is not permitted for bots. Most likely it’s a request from the yje Google Translate service. Perhaps a hacker tried to use Google Translate as proxy to probe the website for something like vulnerable scripts. Actually, there is nothing to worry about. The plugin doesn’t prevent search engines from crawling normal, public pages and indexing a website.

See also: https://www.ads-software.com/support/topic/crawl-66-249-64-77-googlebot-com-probing-for-vulnerable-php-code/