I haven't been seeing anything like that here, and my virus/malware checkers aren't reporting anything either - but I also run an ad blocker so my browser isn't having to deal with everything you do.
I suspect it's a local internet issue or problem with your device or browser. Since you are reporting it as a 404 error, which means the page isn't found, it could be something as simple as clearing your browser cache. It might also be worth checking your DNS settings and moving to one of the big provider DNS servers like Google (8.8.8.8 and 8.8.4.4), OpenDNS (208.67.222.222 and 208.67.220.220) or Cloudflare (1.1.1.1 and 1.0.0.1).
Good luck!