This looks like it would be the error page of your site. Which means Kirby cannot find the matching page for /feed. Are you 100% sure it’s in ``content/feed/feed.txt`?
you might need to add a site/blueprints/pages/feed.yml even if its empty all but the title. kirby maps blueprints to templates not the other way round.
I was really sure everything was fine for months. Yesterday I changed the image file from png to a jpg - manually via FTP. After changing “platten-panorama-der-musikpodcast.png” to “platten-panorama-der-musikpodcast.jpg” everything seems up and running again
My hunch why this was the issue: Could it be that you also have a platten-panorama-der-musikpodcast.jpg.txt in the same folder? When you changed the image file to .png via FTP, this text file would not have a matching media file anymore and so Kirby would have the platten-panorama-der-musikpodcast.jpg.txt and feed.txt as potential main content files - without a clear indication which one to use for content, template etc.
Exactly, that’s what I meant yesterday, was a bit late in the afternoon
I needed to change the text file accordingly from “platten-panorama-der-musikpodcast.png.txt” to “platten-panorama-der-musikpodcast.jpg.txt” and then it worked… Thank you guys very much!