My Feed is invalid

It would be more useful if you post a link to your feeds…

The Feed: https://www.frpeterleung.com/blog/feed/

It says “Feed Code Error” on the title.

use

bloginfo_rss(‘charset’);

in your feed because that is the template tag used to retrieve the charset

utf-8

etc for your blog.

Help! My feed is invalid as well! https://topazz.quiblit.com/

What do I do now?

Who said so?
https://validator.w3.org/feed/check.cgi?url=http%3A%2F%2Ftopazz.quiblit.com%2Findex.php%2Ffeed%2F

Yeah, my feed is invalid to all other aggregators besides my browsers. This is because the feed address is php code! Where’s the beef fellas?

Where’s the beef fellas?
Wrong question. The real question is: Where is your blog?