Issues

Hi we got issues with the plugin and cant find where issues is, this problem did appear when a client bought a product

Fatal error: Uncaught Error: Call to undefined method Automattic\WooCommerce\Admin\Overrides\Order::is_unpaid() in /var/www/partify.se/maskiner/wp-content/plugins/depart-deposit-and-part-payment-for-woo/inc/functions.php:127 Stack trace: #0 /var/www/partify.se/maskiner/wp-content/plugins/depart-deposit-and-part-payment-for-woo/inc/deposit-backend.php(464): depart_get_schedule_payments_summary(Object(Automattic\WooCommerce\Admin\Overrides\Order)) #1 /var/www/partify.se/maskiner/wp-admin/includes/template.php(1456): VicoDIn\Inc\Deposit_Backend->schedule_payments_summary(Object(Automattic\WooCommerce\Admin\Overrides\Order), Array) #2 /var/www/partify.se/maskiner/wp-content/plugins/woocommerce/src/Internal/Admin/Orders/Edit.php(506): do_meta_boxes(Object(WP_Screen), ‘normal’, Object(Automattic\WooCommerce\Admin\Overrides\Order)) #3 /var/www/partify.se/maskiner/wp-content/plugins/woocommerce/src/Internal/Admin/Orders/Edit.php(410): Automattic\WooCommerce\Internal\Admin\Orders\Edit->render_meta_boxes() #4 /var/www/partify.se/maskiner/wp-content/plugins/woocommerce/src/Internal/Admin/Orders/PageController.php(294): Automattic\WooCommerce\Internal\Admin\Orders\Edit->display() #5 /var/www/partify.se/maskiner/wp-includes/class-wp-hook.php(324): Automattic\WooCommerce\Internal\Admin\Orders\PageController->output(”) #6 /var/www/partify.se/maskiner/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(”, Array) #7 /var/www/partify.se/maskiner/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #8 /var/www/partify.se/maskiner/wp-admin/admin.php(260): do_action(‘woocommerce_pag…’) #9 {main} thrown in /var/www/partify.se/maskiner/wp-content/plugins/depart-deposit-and-part-payment-for-woo/inc/functions.php on line 127