It seems there is a problem on "Preview on Save" option in RStudio 2022.07.1 Build 554.
The code below is saved as "tmp1.Rmd". I can run chunks, and I CAN use Preview button (it works). But I can NOT save with "Preview on Save" option set.
When I change YAML Header output from output: html_notebook
to output: html_document
the error stops (I saw in this question).
Is this an RStudio bug?
The code:
---
title: "R Notebook"
output: html_notebook
---
# VE
```{r}
x=3
```
end