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rshinyweb-applicationsrstudio

Run App gives no result R shiny app and crashes RStudio

I'm having an issue with the running of a R shiny app. Here's what I do:

  1. open RStudio
  2. load the shiny code (e.g. app.R)
  3. set the wd
  4. library(shiny)
  5. press on "Run App"

Then nothing happens.

And if I try to terminate the execution, R does not answer anymore and says to force the closing of RStudio.

Here's one of my codes (I tried some, so I don't think this is the issue, but I report one anyway):

library(shiny)

# Define UI for application that draws a histogram
ui <- fluidPage(
    
    titlePanel("Un'applicazione con uno slider"),
    sidebarLayout(
        h1("Sposta lo Slider!"),
        sliderInput("slider1", "Spostami!", 0, 100, 0)
    ),
    mainPanel(
        h3("Valore dello slider:"),
        textOutput("text")
    )
)

# Define server logic required to draw a histogram
server <- function(input, output) {
    
    output$text <- renderText(input$slider1)
}

# Run the application 
shinyApp(ui = ui, server = server)

Do you have any advice to give me in order to make anything happen? I have no errors shown, so I don't know what to do...

I just see "runApp(...mypath.../app)" and blank space after it.

Thank you in advance.

Edit 1: I also tried this, but nothing happened (as before):

library(shiny)
runExample("01_hello")

Edit 2: Copy-pasting the code directly in the console doen not work either

Solution

  • I was experiencing the same issue with R 4.1 on Windows 10. Updating all packages seems to have solved it:

     update.packages(ask = FALSE, checkBuilt = TRUE)