Probleme Extension Gambit Plugins

(English)
Hello here my problem when I click to go on the link mark gambit plugin voila what is displayed: can you help me please thanks.

(French)
Bonjour voila mon problème quand je clic pour aller sur le lien marquer gambit plugin voila ce qui s’affiche: pouvez vous m”aider s’il vous plait merci.

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Fatal error: Uncaught Error: Cannot use object of type WP_Error as array in /homepages/28/d683748602/htdocs/FRENCHREPUBLICOFGAMER/wp-content/plugins/parallax-backgrounds-for-vc/class-admin-license.php:99 Stack trace: #0 /homepages/28/d683748602/htdocs/FRENCHREPUBLICOFGAMER/wp-includes/class-wp-hook.php(298): GambitAdminLicensePage->display_sale_notice(”) #1 /homepages/28/d683748602/htdocs/FRENCHREPUBLICOFGAMER/wp-includes/class-wp-hook.php(323): WP_Hook->apply_filters(NULL, Array) #2 /homepages/28/d683748602/htdocs/FRENCHREPUBLICOFGAMER/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #3 /homepages/28/d683748602/htdocs/FRENCHREPUBLICOFGAMER/wp-admin/admin-header.php(255): do_action(‘admin_notices’) #4 /homepages/28/d683748602/htdocs/FRENCHREPUBLICOFGAMER/wp-admin/admin.php(214): require_once(‘/homepages/28/d…’) #5 /homepages/28/d683748602/htdocs/FRENCHREPUBLICOFGAMER/wp-admin/plugins.php(10): require_once(‘/homepages/28/d…’) #6 {main} thrown in /homepages/28/d683748602/htdocs/FRENCHREPUBLICOFGAMER/wp-content/plugins/parallax-backgrounds-for-vc/class-admin-license.php on line 99