How to fix errors in RSS?

Question

PHP

Hello everyone, in general, I made a broadcast of new logs for the sniffer via RSS. Everything works fine in the browser. A link like this sniffer.poigraem.uz/rss/kaylos
But when I try to add this link to the rss broadcast of the Telegram bot, it says that the link is not correct. Looking at the code, you can see that the beginning

<?xml version="1.0" encoding="utf-8"?>
<rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/">

marked in red. Although I took it from another RSS, everything is in order there. Tell me what could be the matter?

Answer 1

Maybe the parser doesn't like the string <?xml version="1.0" encoding="utf-8"?>
Or there is an unclosed tag in the text. Or there are links to the schema and the parser does not have access to it.

Answer 2

all tags without question marks