The feed https://www.jenkins.io/changelog-stable/rss.xml seems valid:
https://validator.w3.org/feed/check.cgi?url=https%3A%2F%2Fwww.jenkins.io%2Fchangelog-stable%2Frss.xml but I cannot use it on Confluence page with RSS feed macro:
The URL is whitelisted by admin. There are two possibility:
Either one fix it at the source of the RSS feed, or admins switch off the validation on Confluence site. Second possibility has impact on all RSS feeds.
There is also a way around this problem. I can use REST API for latest LTS releases instead of latest releases:
but I don't know the URL.
Best regards, Piotr
error rendering macro 'rss'
com.atlassian.confluence.MacroExecutionException:lllegal character in scheme name at index
there is also a way around through are to exaption API for latest to the scheme name