Sorry again for the late reply, took a lot of time to find out why the feeds were failing
I have updated the feeds with the new URLs but full-text-rss is still failing with this error
So after spending some time investigating this issue, I found out this was a bug in the custom config files we are using with full-text-RSS. Sometimes we are unable to scrape some sites so we have to tweak full-text-RSS config for each site and tell the scraper from which HTML element ID to extract the content, or remove some elements when it scrapes the wrong content
Turns out the bug was a line in the global config file of full-text RSS that was stripping HTML elements based on a regex that was not restrictive enough, so the text content was stripped by mistake.
The same global config is used on other platforms too, so this bug could have affected other sources.
I have now fixed it, BUT there are different issues with other feeds, like this one:
https://morss.anarsistkutuphane.org/:proxy:order=last/lib.anarcho-copy.org/feed
Our scrapers are failing with the error [unable to retrieve full-text content]
https://www.anarsisthaberler.net/rss_aggregator/full-text-rss/makefulltextfeed.php?force=1&url=https%3A%2F%2Fmorss.anarsistkutuphane.org%2F%3Aproxy%3Aorder%3Dlast%2Flib.anarcho-copy.org%2Ffeed&max=5&links=preserve&submit=Create+Feed
and this time it's not a bug with our custom config because the feed also fails with the default config on Full Text RSS website:
http://ftr.fivefilters.net/makefulltextfeed.php?url=https%3A%2F%2Fmorss.anarsistkutuphane.org%2F%3Aproxy%3Aorder%3Dlast%2Flib.anarcho-copy.org%2Ffeed&max=3
So next, I will check if we can make a custom config for this site and tell the scraper to get a specific HTML element