Fatal Error - Trying to Insert Sample Data

Hi, I am trying to insert sample data for this theme. I keep getting a fatal error.

Warning: file_get_contents(): http:// wrapper is disabled in the server configuration by allow_url_fopen=0 in /home/caponeol/public_html/wp-content/themes/geocrafttheme-v2/library/install-upgrade/class-dummy-listing.php on line 37

Warning: file_get_contents(http://capone.olnz.co.nz/wp-content...-v2/library/install-upgrade/dummy-listing.xml): failed to open stream: no suitable wrapper could be found in /home/caponeol/public_html/wp-content/themes/geocrafttheme-v2/library/install-upgrade/class-dummy-listing.php on line 37

Notice: Trying to get property of non-object in /home/caponeol/public_html/wp-content/themes/geocrafttheme-v2/library/install-upgrade/class-dummy-listing.php on line 77

Notice: Trying to get property of non-object in /home/caponeol/public_html/wp-content/themes/geocrafttheme-v2/library/install-upgrade/class-dummy-listing.php on line 77

Fatal error: Uncaught Error: Call to a member function children() on null in /home/caponeol/public_html/wp-content/themes/geocrafttheme-v2/library/install-upgrade/class-dummy-listing.php:77 Stack trace: #0 /home/caponeol/public_html/wp-content/themes/geocrafttheme-v2/library/install-upgrade/class-dummy-listing.php(38): GC_DummyListing->create_field(false, false, true) #1 /home/caponeol/public_html/wp-includes/class-wp-hook.php(287): GC_DummyListing->dummy_installation_notice('') #2 /home/caponeol/public_html/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array) #3 /home/caponeol/public_html/wp-includes/plugin.php(478): WP_Hook->do_action(Array) #4 /home/caponeol/public_html/wp-admin/admin-header.php(281): do_action('admin_notices') #5 /home/caponeol/public_html/wp-admin/themes.php(185): require_once('/home/caponeol/...') #6 {main} thrown in /home/caponeol/public_html/wp-content/themes/geocrafttheme-v2/library/install-upgrade/class-dummy-listing.php on line 77


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