Kindly, Make sure you have followed all the steps mentioned below,
1) You need to install the dummy contents from Dashboard > Humanity > General > Import Dummy Data ( Top right corner).
2) Then update the permalinks from Dashboard > Settings > Permalinks.
3) Change the home page from Dashboard > Settings > Readings.
4) Update the menus locations from Dashboard > Appearance > Menus -> Menu Locations.
5) Add slider to layerslider or revolution slider and add it to the home page using the slider options below the editor section.
Note: Make sure you have installed all the recommended plugins before these steps.