Hi,
just getting started with quarto (thanks), and not sure I've got the jupyter side of things sorted out.  I think I've installed the irkernel for R okay. but am struggling to convert a .qmd file to .ipynb. 

Running 'quarto check' in the folder I see the error (at bottom):

```
stephen@blur estimateq % quarto check          

[✓] Checking Quarto installation......OK
      Version: 1.0.38
      Path: /Applications/quarto/bin

[✓] Checking basic markdown render....OK

[✓] Checking Python 3 installation....OK
      Version: 3.10.6
      Path: /opt/homebrew/opt/python@3.10/bin/python3.10
      Jupyter: 4.11.1
      Kernels: ir

[✓] Checking Jupyter engine render....OK

ERROR: Invalid jupyter YAML metadata found in file (must be string or object)
```

where might I find the invalid YAML?  If the check script knows the location (file/line number) of the error, is there any chance it could report that?

As far as I can tell, the only yaml file I've got in the folder is the following

```
---
title: "Example quarto document: estimating PI"
author: "Stephen J Eglen"
date: "2022-08-20"
bibliography: refs.bib
format: 
  html:
    code-fold: false
---
```

(what I'd like to do is specify the ir kernel).

(As a minor aside, when I saw the rstudioconf talk that quarto was 'batteries included', I had falsely assumed that it would include all the python/jupyter machinery.  but I don't think it did, so I've done the following:

```
python3 -m pip install jupyter
```

and from the R side, installed the irkernel package and installed the kernel

```
install.packages('IRkernel')  # Don’t forget step 2/3!
IRkernel::installspec()
```
)
2022-08-20T22:28:04Z
sje30
closed
ERROR: Invalid jupyter YAML metadata found in file (must be string or object)
https://github.com/quarto-dev/quarto-cli/issues/2020