When I come across a broken RSS feed, the usual reason its all blown to pieces is because line 23 says “Sanford & Sons.”
The most confusing thing is the fact that if you convert the & into &, all is well, even though your alternative still contains the problem character.
Why does RSS fail at rendering the ampersand (&) character by default?
When a ‘raw’
&is seen, the interpreter is looking for one of the valid escaped & sequences (such as'&'). When an invalid sequence is found it throws an error. That’s all there is to it.