The first thing you can check is the website's base URL from the database. To do that, log in to the database and open the table
Find all the entries like
web/secure/base_url and update these with your real base URL (like http://126.96.36.199/plesk-site-preview/rodrigootazu.com/188.8.131.52/).
Note the slash (/) at the last of the URL.
generated folders under the document root.
Check the website again. If it does not help, check whether the server has
mod_rewrite enabled or not. If it is not enabled, first enable it.
If still, there is no change, check for any
rewrite rules in the
.htaccess file in the document root.
I hope it should help.