I'am in the process of creating a shiny dashbord, I create 3 tabItems the problem is that when I click on one of the menuItem I can not click on again, i can't switch between the tabItems . Can someone help me please the code R #UI
 library(shiny)
 library(shinydashboard)
 shinyUI(dashboardPage(skin = "black",
 dashboardHeader(title = h4("Tableau de bord des élections",style =      "color:navy"),
 titleWidth = 300
 ),
 dashboardSidebar(id="", 
 menuItem(h4(strong("Dashboard", align = "center")), tabName = "dashboard"),
 menuItem(h4(strong("Prédiction")), tabName = "Prédiction"),
 menuItem(h4(strong("Interprétation")), tabName = "Interprétation")),
 dashboardBody(
    tabItems(
        tabItem(tabName = "dashboard",h2("Analyse du comportement électoral  des citoyens tunisiens", align="center",style = "color:navy") ),
        tabItem(tabName = "Prédiction", h2("Prédiction du vote",    align="center",style = "color:blue")),
        tabItem(tabName = "Interprétation", h2("Interprétation"))
        )
        )))
 
     
     
    