Cant activate the plugin – add_cap() on null error

Hi, i’m trying to test this plugin out but it keeps giving me this error when attempting to activate it. WordPress install is clean and no plugin is active during the test.

Fatal error: Uncaught Error: Call to a member function add_cap() on null in /nas/content/wp-content/plugins/verge3d/verge3d.php:23 Stack trace: #0 /nas/content/wp-includes/class-wp-hook.php(307): v3d_add_capability('') #1 /nas/content/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters('', Array) #2 /nas/content/wp-includes/plugin.php(474): WP_Hook->do_action(Array) #3 /nas/content/wp-admin/plugins.php(194): do_action('activate_verge3...') #4 {main} thrown in /nas/content/wp-content/plugins/verge3d/verge3d.php on line 23