Class not found…

Hi
I’m trying to enable this plugin but I have this error:
Fatal error: Uncaught Error: Class ‘AmazonAssociatesLinkBuilder\cache\Item_Lookup_Response_Cache’ not found in /wp-content/plugins/amazon-associates-link-builder/includes/activator.php:35 Stack trace: #0 /p-content/plugins/amazon-associates-link-builder/includes/aalb_initializer.php(42): AmazonAssociatesLinkBuilder\includes\Activator->__construct() #1 /wp-content/plugins/amazon-associates-link-builder/amazon-associates-link-builder.php(46): Aalb_Initializer->initialize(‘amazon-associat…’, ‘/…’) #2 /wp-admin/includes/plugin.php(1909): include(‘/var/www/client…’) #3 /wp-admin/plugins.php(172): plugin_sandbox_scrape(‘amazon-associat…’) #4 {main} thrown in /wp-content/plugins/amazon-associates-link-builder/includes/activator.php on line 35