Blank Dashboard Page

Not to be an alarmist, but it’s possible you’ve been compromised. You’re blacklisted at Spamhaus – https://www.spamhaus.org/dbl/removal/record/estrellacristina.com They seem to believe this slide show pro file should be checked: //estrellacristina.com/old/ssp_director/locale/spa/sql.php

Some resources should you decide you need them:

This should be a good starting point for general info: FAQ My site was hacked
There are links to additional resources at the bottom of that article.
Some additional frequently recommended resources to help you:
https://sitecheck.sucuri.net/
https://www.ads-software.com/support/topic/268083#post-1065779
https://smackdown.blogsblogsblogs.com/2008/06/24/how-to-completely-clean-your-hacked-wordpress-installation/
https://ottopress.com/2009/hacked-wordpress-backdoors/
https://www.unmaskparasites.com/
https://blog.sucuri.net/2012/03/wordpress-understanding-its-true-vulnerability.html
And there is some great information in this article: Hardening WordPress

Hey, personally I would try the following.

1. Memory_limit and session_save_path should be set correctly.
2. Disable plugins via renaming folder or through the databse just make sure you copy it to a note pad/try default WordPress installation theme such as 2014/2015.
3. Check your .htaccess file make sure default rewrites are in.
4. Check file permissions/ownership.
5. Last and most importantly if you turn on wp_debug, check/post error logs. So we can see more info.

Please backup your site/database to have a local copy.

Let me know if this did not work.