Custom div errors on empty field for PDF

[cderv]

---
title: title
output: pdf_document
---


:::: {.blackbox data-latex=""}
::: {.center data-latex=""}
:::

**A title**\newline

Some text

::::

Error running filter C:\Users\chris\AppData\Local\R\win-library\4.2\rmarkdown\rmarkdown\lua\latex-div.lua:
...\R\win-library\4.2\rmarkdown\rmarkdown\lua\latex-div.lua:52: attempt to index a nil value (field 'integer index')
stack traceback:
Erreur : pandoc document conversion failed with error 83

From https://community.rstudio.com/t/pandoc-document-conversion-failed-with-error-83/138962/8