Weird error when trying to render Quarto document

[nbr1120]

Hello! I encountered this weird error during a workshop.. we were trying to render a brand new and default Quarto document. The YAML header is essentially like this:

title: YAML
format: html

The error message:

can not read an implicit mapping pair; a colon is missed at line 5, column 4:

    {r}

       ^



Stack trace:

can not read an implicit mapping pair; a colon is missed at line 5, column 4:

    {r}

       ^

    at generateError (file:///C:/Users/uname/AppData/Local/Programs/Quarto/bin/quarto.js:10476:12)

    at throwError (file:///C:/Users/uname/AppData/Local/Programs/Quarto/bin/quarto.js:10479:11)

    at readBlockMapping (file:///C:/Users/uname/AppData/Local/Programs/Quarto/bin/quarto.js:11096:28)

Quarto version is 1.5.55 with the latest R 4.4.1 and Rstudio Version: 2024.04.2. I've never seen this error before, really appreciate any pointers you can provide, thank you!

[jrkrideau]

At a guess you are missing one r both ---.

This runs:

---
title: "YAML"
format: html
---

```{r}
X <- 1:10
X

```
Arma virumque cano…

[nbr1120]

Sorry i should have been clearer: I was trying to render the default content in a Quarto document when it was first created. So the full document would look like this (in Source view)

---
title: "YAML"
format: html
---

## Quarto

Quarto enables you to weave together content and executable code into a finished document. To learn more about Quarto see <https://quarto.org>.

## Running Code

When you click the **Render** button a document will be generated that includes both content and the output of embedded code. You can embed code like this:

```{r}
1 + 1

You can add options to executable code like this

#| echo: false
2 * 2

The echo: false option disables the printing of code (only output is displayed).

[njtierney]

I've had similar errors come up if there is a code chunk or callout (:::) above it that hasn't been closes properly - is the above code a complete reprex?

[nbr1120]

Ok things are resolved after I remove the entire installation of R, Rstudio, and Quarto. I reinstalled them again and it's all back to normal!