The "Subscribe to News" button is broken
S3 - Major
1) Go to more news
2) Scroll Down
3) Click the "Subscribe to News" button
4) this will appear,
I guess you mean the link https://musescore.org/en/news/feed
It works with Internet Explorer, but not with Chrome nor Edge (nither the old not the new Chromium based one)
so use Internet Explorer ;-)
Works with Safari, but not Firefox.
Or use a news feed reader like aKregator (KDE/Linux).