This feature is part of the professional (Pro) version of RStudio. If you aren't using the Pro version, you'll need to switch to it to use this feature.
And if you are using the Pro version, our support team would be glad to help you with this. Please send some more details on your issue (what errors are you seeing) and a diagnostics report ( sudo rstudio-server run-diagnostics ) to our support team at support@rstudio.com.