i installed it without any issue, but i just uncompress the zip file nothing more.

here it is what i found:
visual composer 4.3.1
duplicator 0.5.4

in MySQL here is the code snippet...
[vc_raw_html]JTNDYSUyMGNsYXNzJTNEJTIyc2VydmljZS1saW5rJTIyJTIwdGl0bGUlM0QlMjJJJTIwd2FudCUyMGElMjBXZWJzaXRlJTJDJTIwV2Vi...[/vc_raw_html]

here it is how to get a clean content... so firstly uncoded with MIME base64 and next rawurldecde.

rawurldecode(base64_decode(strip_tags($content)));

открываем файл /templates/yoo_master2/warp/src/Warp/Menu/Nav.php:
 
ищем:
$ul->addClass('uk-nav-parent-icon')->addClass($modifier)->attr('data-uk-nav', is_string($module->nav_settings['accordion']) ? $module->nav_settings['accordion']:'{}');
 
изменяем на:
$ul->addClass('uk-nav-parent-icon')->addClass($modifier)->attr('data-uk-nav1', is_string($module->nav_settings['accordion']) ? $module->nav_settings['accordion']:'{}');
 
 
Нашёл только аналогичный материал для предыдущей версии фреймворка: