Updating pandoc version + using webshot to render to PPT in RStudio Cloud

The IDE (RStudio Open Source, RStudio Server, RStudio Server Pro) bundles pandoc:

There is not currently a means for installing a newer version. There is an issue tracking providing a newer version of pandoc in 1.3 of the IDE.

That said, could you include the error you are receiving that indicates that pandoc 2.4+ is required? Perhaps add a reproducible example?