RSS Feeds in SAP Community Groups not working

Hi everyone,

i´d like to use the RSS Feeds of the SAP Community Groups.
Unfortunately, only the RSS feeds of the parent groups work, but not the individual groups.

So for example, if i want to use the Feed for the parent group "Europe", i´d use:
https://groups.community.sap.com/khhcw49343/rss/Category?category.id=europe∫eraction.style=forum&feeds.replies=true

You can see here, i can request the RSS Feed with the "category.id=europe".

If i now want to use the RSS Feed from Barcelona( "category.id=barcelona"), i get a error Message:

https://groups.community.sap.com/khhcw49343/rss/Category?category.id=barcelona∫eraction.style=forum&feeds.replies=true

Is there a different URL for these Feeds?