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You can import the demo content via the unyson plugin. Kindly refer to our knowledgebase link for how to import the demo contents using the unyson plugin http://docs.wedesignthemes.com/dt_articles/import-demo/
Please check your server requirements., Please refer to the below link for server requirements http://docs.wedesignthemes.com/dt_articles/requirements-for-theme/
If still facing any issues Please mail us your site credentials (WP & FTP access logins) immediately via private reply, So that, We import demo data for you.