Hello,

First, since WordPress themes get more robust and complex, it's necessary that you release some more power from server. You can do that by editing php.ini file that you can find on your server, or contact your hosting service to do this for you. Make sure you meet these requirements and please don't skip this step, since it's probably the most important:

max_execution_time = 300; 
memory_limit = 128M;
upload_max_filesize = 128M; 
post_max_size = 256M;

You should also make sure PHP version on your server is updated.5.6 will do the job, but you may use 7 as well.

Then go to Elated options > Import 

We advise that you do this from Google Chrome, no matter the Operating System. On your keyboard press F12 and select "Console" view.

Set import type to All and Import attachments to YES. like on image.

Then hit "Import" and follow console view.If you see any red error showing up, you should refresh the page and try again.

Repeat the process until demo import is completed, following a successful "Import Completed" message, without errors in the console.

Then go to Dashboard > Plugins and activate what you need.

And you will have site like on our demo. 

And if there is some Revolution slider  files you need to import it separately. 

Revolution Slider files do not import automatically, and you will need to import these slides manually. Here is guide.

First thing you need to make sure you've downloaded correct file from ThemeForest, from themeforest.net find the theme and in download button dropdown, select "All files & documentation".

Then you will need to navigate to Dashboard > Revolution Slider > Import and then browse the folder you've downloaded from ThemeForest and find the Theme Main Files > xml_export > revslider

Also, make sure to navigate to Dashboard > Revolution Slider > Global Settings and set these Grid Sizes that we use in our demos:

 Let us know is this helped you to fix your problem.

Best regards,

Nicolas