Included VC activation error

Hello.

I just bought your WP theme pack.
already installed with WP theme automated installer. and I am trying to activate plugins now.

But could not activate Visual Composer

I think this is error message of VC.

Warning: require_once(/home/u408606936/public_html/wp-content/plugins/js_composer/include/classes/core/interfaces.php): failed to open stream: No such file or directory in /home/u408606936/public_html/wp-content/plugins/js_composer/js_composer.php on line 173

Fatal error: require_once(): Failed opening required ‘/home/u408606936/public_html/wp-content/plugins/js_composer/include/classes/core/interfaces.php’ (include_path=’.:/opt/alt/php70/usr/share/pear’) in /home/u408606936/public_html/wp-content/plugins/js_composer/js_composer.php on line 173

I am using Hostinger services and WP 4.9.6.

Please help me.

Ticket