You initially posted in a thread that was already closed two months ago.
Now you have opened two new threads.
AdSense ad in the sidebar (code block 6) is sticky and it works as expected – AdSense ad stays on the top when the page scrolls.
Tested in Chrome and Firefox.

Do you get any javascript errors in the Safari console?
I tested also in Internet Explorer and found the following issues:
On https://paris.salidainmediata.com/
HTML1509: Unmatched end tag.
File: paris.salidainmediata.com, Line: 417, Column: 204
<tbody>
<tr>
<td valign="top" width="141"><img class="alignnone size-full wp-image-2323" src="https://paris.salidainmediata.com/wp-content/uploads/2017/12/parisvisite.jpg" alt="parisvisite" width="129" height="96" /></p>
<table style="height: 5px;" width="25" cellspacing="0" cellpadding="0">
<tbody>
I get also javascript errors
SCRIPT65535: Invalid calling object
File: script block (670), Line: 1, Column: 52922
Please fix HTML/javascript issues first.