Hi,

I notices that when you install the new version of JSitemap pro 3.5, the robots.txt gets edited.

Specifically these lines are added to the top:

User-Agent: Googlebot
Allow: /*.js*
Allow: /*.css*
Allow: /*.png*
Allow: /*.jpg*
Allow: /*.gif*

I understand the intention, but unfortunately this gives access to EVERYTHING on the server.
If you test, for instance "administrator/index.php" in the robots.txt test tool on the Google Search Console, you will see it's not blocked.

I guess it comes from the way robots.txt files work: you have to be specific about what you allow AND disallow.

So this works better:

User-Agent: Googlebot
Allow: /*.js*
Allow: /*.css*
Allow: /*.png*
Allow: /*.jpg*
Allow: /*.gif*
Disallow: /administrator/
Disallow: /cli/
Disallow: /includes/
Disallow: /installation/
Disallow: /language/
Disallow: /libraries/
Disallow: /log/
Disallow: /logs/
Disallow: /tmp/

Googlebot will have access to ALL js, css, ... files on the server, EXCEPT those in the listed directories with the "Disallow" statement.