The error is not clearly reproducible, I thought, setting a user_agent would help. But it does not.
@fivefilters could you please check
https://www.digitalfernsehen.de/feed/ with FTR?
Sometimes at first try it returns a yellow page with an empty box. Sometimes with an error like
PHP version: 8.1.23
After reloading, I get the feed with fulltext content. On my first tries, sometimes, a random single article only contains cryptic text. After reloading that article was o.k. but maybe a different one had that problem.
I can’t reproduce this any longer. I tried it simultaneously with my productive FTR 3.9.13 (php 7.4.33, APCu 5.1.22) and my testing FTR 3.9.13 (php 8.1.23, no cache) which I use to develop or edit site_configs. Several times reloaded the feed with FTR in short intervalls. No errors, no scrambled text.
Hopefully this was only a temporarily problem at the source site.
However, it would have been nice if we could have found the cause of the parsing error to avoid the error message.
Hmm, very odd. I wonder if it’s the server returning a compressed response that can’t be uncompressed, or perhaps without the headers incidating that it’s compressed. Will test a bit more to see if I can reproduce.