Kindly, Make sure you have followed all the steps mentioned below,
Step 1 – You need to install the dummy contents from Dashboard -> Appearance -> Whistle Options -> Import Dummy Data ( Top right corner).
Step 2 – Then update the permalinks from Dashboard > Settings > Permalinks.
Step 3 – Change the home page from Dashboard > Settings > Readings.
Step 4 – Update the menus locations from Dashboard > Appearance > Menus > Menu Locations.
Step 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.