I'd recommend looking around your computer/programs and seeing if there's anything besides antivirus/adblockers/firewall blocking stuff off. Mediafire will sometimes get blocked by any of these things without warning, even if you turn these off (Even if I disabled my malware protection, sometimes it won't let me download stuff off Mediafire). Googling the first portion of that link takes me to Adfly, although even stuff about the site being a virus or browser hijacker pops up, too. So definitely look around and see if you have anything else running, alongside checking and seeing if it's put anything strange on to make sure that it's not a corrupted Mediafire link giving you that.