Error Thrown in payouts.php

Error Details

An error of type E_ERROR was caused in line 222 of the file xxx/wp-content/plugins/woo-coupon-usage-pro/premium-files/pro-addons/payouts/payouts.php. Error message: Uncaught TypeError: Unsupported operand types: int – string in xxx/wp-content/plugins/woo-coupon-usage-pro/premium-files/pro-addons/payouts/payouts.php:222
Stack trace: 0 xxx/wp-content/plugins/woo-coupon-usage-pro/premium-files/pro-addons/payouts/payouts.php(100): wcusage_do_action_order_update_commission_change() 1 xxx/wp-includes/class-wp-hook.php(326): wcusage_order_update_commission() 2 xxx/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() 3 xxx/wp-includes/plugin.php(517): WP_Hook->do_action() 4 xxx/wp-content/plugins/woocommerce/includes/class-wc-order.php(458): do_action() 5 xxx/wp-content/plugins/woocommerce/includes/class-wc-order.php(274): WC_Order->status_transition() 6 xxx/wp-content/plugins/woocommerce/includes/admin/meta-boxes/class-wc-meta-box-order-data.php(828): WC_Order->save() 7 xxx/wp-includes/class-wp-hook.php(326): WC_Meta_Box_Order_Data::save() 8 xxx/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() 9 xxx/wp-includes/plugin.php(517): WP_Hook->do_action() 10 xxx/wp-content/plugins/woocommerce/src/Internal/Admin/Orders/Edit.php(318): do_action() 11 xxx/wp-content/plugins/woocommerce/src/Internal/Admin/Orders/Edit.php(153): Automattic\WooCommerce\Internal\Admin\Orders\Edit->handle_order_update() 12 xxx/wp-content/plugins/woocommerce/src/Internal/Admin/Orders/PageController.php(351): Automattic\WooCommerce\Internal\Admin\Orders\Edit->setup() 13 xxx/wp-content/plugins/woocommerce/src/Internal/Admin/Orders/PageController.php(367): Automattic\WooCommerce\Internal\Admin\Orders\PageController->prepare_order_edit_form() 14 xxx/wp-content/plugins/woocommerce/src/Internal/Admin/Orders/PageController.php(166): Automattic\WooCommerce\Internal\Admin\Orders\PageController->setup_action_edit_order() 15 xxx/wp-includes/class-wp-hook.php(324): Automattic\WooCommerce\Internal\Admin\Orders\PageController->handle_load_page_action() 16 xxx/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() 17 xxx/wp-includes/plugin.php(517): WP_Hook->do_action() 18 xxx/wp-admin/admin.php(238): do_action() 19 {main}

thrown