Display source code within post

Hi,

I am trying to display source code on a post following the wordpress documentation as here:

https://en.support.wordpress.com/code/posting-source-code/

but it seems it does not work.

Even if I am trying with the documentation sample code.
[code language=”css”]
#button {
font-weight: bold;
border: 2px solid #fff;
}
[/code]

the
[code language=”css”]

[/code]

part is also displayed, whilst the code format does not change as is is supposed to.

Please let me know if I am doing something wrong.

Thanks in advance.