Thanks Nikko,
It worked!
I managed myself. Because the caption border has 1px width, the image is displayed with 2px smaller. You have two options.
1. Set the border to 0px
2. Set the padding from 5 to 4px.
With the new WordPress 4.9 is easier to see the base.css where are the wp-caption settings.
Please see private.
The problem was from “ModSecurity” in Apache. If is activated you cannot add media or saving some post/pages with layout builder modules. Now it’s working.
Good to know for the other users that have this issue.
Using “Layout elements” generate this error. I cannot insert in a page any of the “layout elements” because when I save i get “wp-admin/post.php – Error 404 – page not found”
Sent.