R shiny error: Cannot coerce type 'closure' to vector of type 'double'

I would like to take in a vector of numbers as input and then simply plot the histogram. Here is my R code:

ui.R:

library(shiny)

shinyUI(pageWithSidebar(

  headerPanel("Hello Shiny!"),

  sidebarPanel(selectInput("Vector", "Select Numbers", c(1,2,3,4), selected = NULL, multiple = TRUE)),

  mainPanel( plotOutput("plotVector"))
))

Server.R:

library(shiny)
shinyServer(function(input, output) {

v<- function()
 {
  v <- rnorm(input$Vector)#take vector as input
}

  output$plotVector <- renderPlot({  hist(as.numeric(v))}) 

})

code to run the app:

library(shiny)
runApp("C:/Users/me/Desktop/R Projects/testShiny")

When I run this I am getting the error "Cannot coerce type 'closure' to vector of type 'double'"

Can you help? Thank you.