Error when compiling snippet "Parenthesize a group of notes using a Scheme function"

[Joseph Srednicki]

I am running Lilypond 2.24.0 on Windows 11.

I am trying the use the snippet entitled "Parenthesize a group of notes using a Scheme function" located at https://lsr.di.unimi.it/LSR/Snippet?id=902.

I receive the following errors:

:/Users/jossr/AppData/Local/Temp/frescobaldi-ml8etqod/tmp7uoisrq_/document.ly:12:19: error: bad grob property path

\once \override

ParenthesesItem.stencils = #(lambda (grob)

C:/Users/jossr/AppData/Local/Temp/frescobaldi-ml8etqod/tmp7uoisrq_/document.ly:18:19: error: bad grob property path

\once \override

ParenthesesItem.stencils = #(lambda (grob)

C:/Users/jossr/AppData/Local/Temp/frescobaldi-ml8etqod/tmp7uoisrq_/document.ly:25:13: error: bad grob property path

\override

ParenthesesItem.font-size = #5

My knowledge of Scheme is rudimentary and limited to reading the documentation and writing some simple functions. I also searched the archive to see if someone else had reported this issue but did not find anything.

Thanks.