doesn't work properly for latest WP versions and Amazon RSS Feeds

this plugin obviously doesn’t work with the latest WP versions and Amazon RSS Feeds.

if you change the initial

[apf domain="com|au|br|ca|cn|fr|de|in|it|jp|mx|es|uk" kw="Keyword" type="new|popular|recent" tag="AssociateTag-20" length="20" details="true|false" target="_blank|_self|_top"]

to your own country or target market like

[apf domain="de" kw="laptops" type="new" tag="****-21" length="10" details="true" target="_blank"]

you only get a fatal error message

Fatal error: Call to undefined method WP_Error::get_item_quantity() in /home/********/public_html/wp-content/plugins/amazon-product-feeder/amazon-product-feeder.php on line 76

Furthermore the susantas lab associate ID is hidden in the plugin code

As long as Susantas Lab doesn’t care for full functionality anymore, this plugin is completely worthless …