This website was in one server, and that server failed, so an automatic backup has made. the problem is that now it looks like a lot of files are missing, if I check the console in the browser there is a lot of 404 errors, and the requested URL is wrong.
Is there a kind of configuration file in which I can set the url that wordpress should use to request the files?
Update: Only the .js, .css and .png files are wrong requested, the .php and .html files are fine.
I fixed it, the file I was searching for is wp-config.php, and the line that did the trick is
define('WP_SITEURL', 'http://example.com');
I don't know what was the problem, but I basically solved it overwriting that config variable.