this feed has literal
<html> starting element in its contents so it gets flagged as possible html content and you can’t subscribe because it doesn’t contain any feeds (because it is a feed)
<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns="http://www.w3.org/TR/REC-html40" xmlns:x="urn:schemas-microsoft-com:office:excel">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="ProgId" content="Excel.Sheet">
<meta name="Generator" content="Microsoft Excel 15">
<link rel="File-List" href="2019_PatchTable.fld/filelist.xml">
<body vlink="#954F72" link="#0563C1" class="xl65">
et cetera, et cetera.
i have no idea if its technically broken to do shit like that but it’s still really stupid. article content is supposed to be a partial document not this horrible microsoft office garbage dump with meta tags included.
anyway, i’m not going to add further hacks because of people who put shit like that in rss feeds, so as a workaround i suggest using batch subscribe (in preferences -> feeds) which doesn’t do any validation and would simply subscribe you to the feed.
e: i guess tt-rss should require
text/html response content type when checking for html content, i’m sure that would break at least one dumbfuck blog out there but at least it would be more technically correct. i’ll think about it.
e2: done https://git.tt-rss.org/fox/tt-rss/commit/de713035fd96684cf8817b8cf0e5a980690ca260