It's working for me on RStudio Cloud (so newer RStudio and also newer R than what you're running). Here's a link to an RStudio Cloud project where I went through the steps for the first section of the tutorial (I put the demo shiny app in the inst folder):
Note that I did need to install the development version of httpuv to get shiny working properly on RStudio Cloud. But even without doing that, I still had the gauge displaying properly in the viewer pane:
Not sure what might be going wrong for you, but it's never a bad idea to start with some system information:
Useful system information…
System Information:
- RStudio Edition: (Desktop or Server)
- RStudio Version:
- OS Version:
- R Version:
Also:
Depending on your issue, the following may be useful
If a section isn't relevant or you can't collect it just delete that section below
- RStudio diagnostics report: rstd.io/support-diagnostics-report
- Your
sessionInfo(): - RStudio crash report: rstd.io/support-crash-report
- RStudio application log files: rstd.io/support-ide-log-files