Since updating to tx_news 11.0.0 the RSS-Feed dont work anymore. Using "RSS feed by TypoScript" as described in the documentation under best practice (https://docs.typo3.org/p/georgringer/news/11.0/en-us/Tutorials/BestPractice/Rss/Index.html#rss-feed-by-typoscript).
Didn't change anything so far. Hope it is an bug that will be fixed soon.
The Problem was:
pageNewsRSS.10.settings.categories = [empty]
I don't use categories, so I left it blank. Befor version 11 it seems to be no problem.