Can't Add feed on Porsche EV

I am not a power user - just follow some feeds and actually set up NewsBlur several years ago. At this site (Porsche RSS newsfeed - Porsche USA) I found what appears to be a RSS feed that I would like to get. The feed address I want is Official Porsche Website - Dr. Ing. h.c. F. Porsche AG

When I enter this into my NewsBlur I get an error message saying the site is not an RSS feed. Below is a screen shot of the message. What am I doing wrong?

that address may be what they put in the visible text, but the rss feed the page itself is announcing is

it also hasn’t updated since february 2022.