PHP Fatal error: Uncaught TypeError:

Hello

I am getting the following fatal error

[28-Jun-2023 19:53:25 UTC] PHP Fatal error: Uncaught TypeError: Unsupported operand types: string – string in /home/site/public_html/wp-content/plugins/checkout-fees-for-woocommerce/includes/class-alg-wc-order-fees.php:776

Stack trace:

#0 /home/site/public_html/wp-content/plugins/checkout-fees-for-woocommerce/includes/class-alg-wc-order-fees.php(410): Alg_WC_Order_Fees->calculate_the_fee(Array, 0, 180, 'fee_1', Object(Automattic\WooCommerce\Admin\Overrides\Order))

#1 /home/site/public_html/wp-content/plugins/checkout-fees-for-woocommerce/includes/class-alg-wc-order-fees.php(289): Alg_WC_Order_Fees->get_the_fee(Object(Automattic\WooCommerce\Admin\Overrides\Order), Array, 'fee_both')

#2 /home/site/public_html/wp-content/plugins/checkout-fees-for-woocommerce/includes/class-alg-wc-order-fees.php(217): Alg_WC_Order_Fees->maybe_add_order_fee(Array, Object(Automattic\WooCommerce\Admin\Overrides\Order))

#3 /home/site/public_html/wp-content/plugins/checkout-fees-for-woocommerce/includes/class-alg-wc-order-fees.php(110): Alg_WC_Order_Fees->add_gateways_fees(Object(Automattic\WooCommerce\Admin\Overrides\Order), 'stripe')

#4 /home/site/public_html/wp-includes/class-wp-hook.php(310): Alg_WC_Order_Fees->alg_wc_cf_update_order_fees(3738, Object(WP_Post))

#5 /home/site/public_html/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(3738, Array)

#6 /home/site/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array)

#7 /home/site/public_html/wp-includes/post.php(4715): do_action('save_post', 3738, Object(WP_Post), true)

#8 /home/site/public_html/wp-includes/post.php(4817): wp_insert_post(Array, false, true)

#9 /home/site/public_html/wp-content/plugins/woocommerce/includes/data-stores/abstract-wc-order-data-store-cpt.php(185): wp_update_post(Array)

#10 /home/site/public_html/wp-content/plugins/woocommerce/includes/data-stores/class-wc-order-data-store-cpt.php(188): Abstract_WC_Order_Data_Store_CPT->update(Object(Automattic\WooCommerce\Admin\Overrides\Order))

#11 /home/site/public_html/wp-content/plugins/woocommerce/includes/class-wc-data-store.php(196): WC_Order_Data_Store_CPT->update(Object(Automattic\WooCommerce\Admin\Overrides\Order))

#12 /home/site/public_html/wp-content/plugins/woocommerce/includes/abstracts/abstract-wc-order.php(212): WC_Data_Store->update(Object(Automattic\WooCommerce\Admin\Overrides\Order))

#13 /home/site/public_html/wp-content/plugins/woocommerce/includes/class-wc-order.php(244): WC_Abstract_Order->save()

#14 /home/site/public_html/wp-content/plugins/woocommerce/includes/class-wc-order.php(143): WC_Order->save()

#15 /home/site/public_html/wp-content/plugins/woocommerce-gateway-stripe/includes/abstracts/abstract-wc-stripe-payment-gateway.php(547): WC_Order->payment_complete('ch_3NO4QZCwJawK...')

#16 /home/site/public_html/wp-content/plugins/woocommerce-gateway-stripe/includes/class-wc-gateway-stripe.php(470): WC_Stripe_Payment_Gateway->process_response(Object(stdClass), Object(Automattic\WooCommerce\Admin\Overrides\Order))

#17 /home/site/public_html/wp-content/plugins/woocommerce/includes/class-wc-checkout.php(1050): WC_Gateway_Stripe->process_payment(3738)

#18 /home/site/public_html/wp-content/plugins/woocommerce/includes/class-wc-checkout.php(1279): WC_Checkout->process_order_payment(3738, 'stripe')

#19 /home/site/public_html/wp-content/plugins/woocommerce/includes/class-wc-ajax.php(507): WC_Checkout->process_checkout()

#20 /home/site/public_html/wp-includes/class-wp-hook.php(308): WC_AJAX::checkout('')

#21 /home/site/public_html/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters('', Array)

#22 /home/site/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array)

#23 /home/site/public_html/wp-content/plugins/woocommerce/includes/class-wc-ajax.php(96): do_action('wc_ajax_checkou...')

#24 /home/site/public_html/wp-includes/class-wp-hook.php(308): WC_AJAX::do_wc_ajax('')

#25 /home/site/public_html/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(NULL, Array)

#26 /home/site/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array)

#27 /home/site/public_html/wp-includes/template-loader.php(13): do_action('template_redire...')

#28 /home/site/public_html/wp-blog-header.php(19): require_once('/home/site/...')

#29 /home/site/public_html/index.php(17): require('/home/site/...')

#30 {main}

  thrown in /home/site/public_html/wp-content/plugins/checkout-fees-for-woocommerce/includes/class-alg-wc-order-fees.php on line 776