server <- function(input, output) { }
shinyApp(ui, server)
I use R Studio and Windows 10. But it seems that R is trying to open the dashboard since a red circle appears on the console, but it does not open anything
Maybe it is serving the app but the windows is not popping up. You can copy the URL (something like http://127.0.0.1:6406 printed on the console output) and see of you can open the app in the browser.
With runApp() you'll have more control over how the app is launched (see launch.browser and display.mode arguments: