CodeCopy & Syntax highlighting don't work for me.

[GrassBlock1]

Like issue #610 ,the copy button near code blocks and syntax highlighting don't show at all,but I had write the code block with language declaration and it seemed not work either.(even with the sample in example site)

My code block:

Render result:

My config:
params.toml

colorScheme = "noir"
defaultAppearance = "light" # valid options: light or dark
autoSwitchAppearance = true

enableSearch = true
enableCodeCopy = true

markup.toml

# -- Markup --
# These settings are required for the theme to function.

[goldmark]
    [goldmark.renderer]
  unsafe = true

[highlight]
  noClasses = false

Regardless if its draft page or not, hugo server or generated public pages, it doesn't work.
More info can be provided if needed.

[GrassBlock1]

seems like a issue with custom rss template and render-codeblock.rss.xml hook.
my fault.