Same for me. My error is the following.
An error of type E_ERROR was caused in line 32 of the file /home/(website)/public_html/wp-content/plugins/autocomplete-woocommerce-orders/includes/quadlayers/widget.php. Error message: Uncaught Error: Undefined constant "QLTTF_PREFIX" in /home/(website)/public_html/wp-content/plugins/autocomplete-woocommerce-orders/includes/quadlayers/widget.php:32 Stack trace: #0 /home/(website)/public_html/wp-admin/includes/template.php(1401): QL_Widget->display_dashboard_widget('', Array) #1 /home/(website)/public_html/wp-admin/includes/dashboard.php(265): do_meta_boxes(Object(WP_Screen), 'normal', '') #2 /home/(website)/public_html/wp-admin/index.php(203): wp_dashboard() #3 {main} thrown