Error when generating CN22

I get a series of errors when using this plugin to generate a CN22.

Is this plugin still supported?

Thanks!

Warning: getimagesize(http://camleyphoto.staging.wpengine.com/wp-content/plugins/orb-seller-cn22/cn22.jpg): failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found in /nas/content/staging/camleyphoto/wp-content/plugins/orbseller-cn22-pdf/includes/libs/tcpdf/include/tcpdf_images.php on line 171

Warning: imagecreatefromjpeg(http://camleyphoto.staging.wpengine.com/wp-content/plugins/orb-seller-cn22/cn22.jpg): failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found in /nas/content/staging/camleyphoto/wp-content/plugins/orbseller-cn22-pdf/includes/libs/tcpdf/tcpdf.php on line 7033

Fatal error: Call to a member function has_weight() on boolean in /nas/content/staging/camleyphoto/wp-content/plugins/orbseller-cn22-pdf/orb-seller-cn22.php on line 143