Users with less than 5 reputation can only make posts on a site's meta if it's about one of their posts on that site. The Ask page displays a list of the user's most recent posts, so they can find the one they need.
However, those links are broken: they point to the
meta subdomain, but with paths of questions on the main site. It looks like their targets are host-relative, when they need to be absolute or protocol-relative.
<a href="/questions/490000/how-do-i-run-a-command-against-files-matching-a-braceglob-pattern-from-a-variab/490001#490001" class="answer-hyperlink timeline-answers">How do I run a command against files matching a brace+glob pattern from a variable?</a></b>
The form does interpret the meta URLs as though they were links to the main site, so this will only cause a problem for users who actually follow the links. It won't be a problem for users who just copy the link to paste it into the form.