I get the following error when trying to use a template with powerpoint in Quarto.
ERROR: Validation of YAML front matter failed.
ERROR: In file myfile.qmd
(line 5, columns 5--40) Field "pptx" has value reference_doc: mytemplate.potx, which must instead be 'default'
--- title: "My title" format: pptx: reference_doc: mytemplate.potx --- ## Quarto Quarto enables you to weave together content and executable code into a finished presentation. To learn more about Quarto presentations see <https://quarto.org/docs/presentations/>.