Import Demo

I have a problem with importing and installing the demo page

.../wp-content/themes/uncode/core/one-click-demo/demo-files/content.xml not found.

.../wp-content/themes/uncode/core/one-click-demo/demo-files/content.xml): failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found in /home/yardsalecrasher/public_html/wp-content/themes/uncode/core/one-click-demo/importer/parsers.php on line 621

Fatal error: Cannot use object of type WP_Error as array in .../public_html/wp-content/themes/uncode/core/one-click-demo/importer/radium-importer.php on line 161