Browser difference and other things :
https://www.websicherheit.at/website-malware-viren-scanner/?url=www.portalcienciayficcion.com

Blacklistings :
http://urlquery.net/report.php?id=1499184387908
https://www.virustotal.com/en/ip-address/62.149.140.146/information/

65(!) suspicious files :
https://quttera.com/detailed_report/www.portalcienciayficcion.com

My advise is to start solving the jquery issue and get dedicated hosting to start with.