xkcd said:
See if you can get the results for these instructions -- it's been a while, but for older versions of Windows (like Windows 7 or Windows 8), the TLS stack doesn't sit well with negotiation against https://hijiribe.donmai.us or https://sonohara.donmai.us. Now that Danbooru has switched to Cloudflare, this is no longer an issue; but the missing files problem is an issue.
Thanks for the link. According to the result page, everything is functional on my end.