Describe the problem you’re having:
When a feed is fetched via HTTP/2 errors are not reported in the UI.
This is because of https://git.tt-rss.org/fox/tt-rss/src/master/include/functions.php#L300, which assumes HTTP1.* as the HTTP version. Since curl learned to speak http2 that assumption is no longer valid.
HTTP/2.0 can both be found in the wild.
tt-rss version (including git commit id):
commit id: ffb842f75
Platform (i.e. Linux distro, PHP, PostgreSQL, etc) versions: