Unable to work in my WordPress

Good Day I have recently bought a site and was builded on wordpress site, I have installed this plugin so i might be able to get a feed. However the plugin is not responding to my site. I got this error Warning: array_pop() expects parameter 1 to be array, null given in /homepages/1/d780476596/htdocs/clickandbuilds/obibuys/wp-content/plugins/1and1-wordpress-assistant/inc/dashboard-widget.php on line 102. The plugin doesn’t show any settings that allow me to put in the codes ShoppingFeeder Deactivate I was advised to install WooCommerce Plugin which i did and the funny part is that once i activate this plugin in the website malfunction and does not show any images and this is the error i got Error! If you use WooCommerce please download and install AliDropship Woo plugin version for PHP 7.2.17 Fatal error: Uncaught Error: Class ‘adsProductTM’ not found in /homepages/1/d780476596/htdocs/clickandbuilds/obibuys/wp-content/themes/rembrandt/tpl/product/loop/_item.php:3 Stack trace: #0 /homepages/1/d780476596/htdocs/clickandbuilds/obibuys/wp-includes/template.php(706): require() #1 /homepages/1/d780476596/htdocs/clickandbuilds/obibuys/wp-includes/template.php(653): load_template(‘/homepages/1/d7…’, false) I really need some assistance to make this work Thank you