After a server crash, I had to re-install TYPO3 using my latest database backup. While I was at it, I upgraded TYPO3 from whatever I installed about half a year ago to 4.7.2 and, consequently, also had to use a newer tt_news module (3.2.1).
Unfortunately, none of the news sections on my site show up now. All it says where they should be in the HTML code is:
<!-- CONTENT ELEMENT, uid:24/list [begin] -->
<div id="c24" class="csc-default">
<!-- Plugin inserted: [begin] -->
<!-- Plugin inserted: [end] -->
</div>
<!-- CONTENT ELEMENT, uid:24/list [end] -->
I did update the database when I installed the plugin and clicked the link for the updater script on the plugin's configuration page, although it didn't seem to do anything.
I'm really new to TYPO3, so I can't be sure it's nothing with the HTML template, which I had to reconstruct from scratch. Also, I'm not really sure yet how you would get an idea of what's going on (or wrong) in cases like this in TYPO3.