I am experiencing the same issue. When I open an active order, all i see is a blank screen with no details. If you scroll down, I have recieved an error message as follows,
Fatal error: Uncaught Error: Class ‘YITH_WCAF_Commissions_Admin_Table_Premium’ not found in /home/customer/www/mycologynow.com/public_html/wp-content/plugins/yith-woocommerce-affiliates/includes/admin/meta-boxes/class-yith-wcaf-order-referral-commissions-meta-box.php:55 Stack trace: #0
Is this not working because I have not purchased the premium version of the plugin?