Yes i tried other RSS feeds and result is same. I made step by step screenshots perhaps they help to find the problem.
I also tried MagicINFO Premium Author 7 NA-MIIPA-7000.0 and in preview window i can see correct data from https://www.kliinikum.ee/et/?format=feed&type=rss or any other RSS feed.
Edit: Tried to attach screenshots but website gave me error "Cannot access attachments upload path!"
https://www.upload.ee/files/10523474/step_1.PNG.html
https://www.upload.ee/files/10523475/step_2.PNG.html
https://www.upload.ee/files/10523476/step_3.PNG.html
https://www.upload.ee/files/10523480/step_4.PNG.html
https://www.upload.ee/files/10523481/step_5.PNG.html