Shipper Pro won't activate

I can’t activate Shipper Pro on my site and I am getting the following error:

Warning: require(phar://aws-3.67.0.phar/aws-autoloader.php): failed to open stream: No such file or directory in /services/webpages/x/e/xe******on.com/public/wp-content/plugins/shipper/lib/aws/sdk-v3.phar on line 4

Fatal error: require(): Failed opening required ‘phar://aws-3.67.0.phar/aws-autoloader.php’ (include_path=’.’:wink: in /services/webpages/x/e/xe******on.com/public/wp-content/plugins/shipper/lib/aws/sdk-v3.phar on line 4