Getting error on checkout page

I installed the backupwp plugin but getting error when user clicking on place order button, Order is not placing, It shows error processing checkout

PLease help me how can I fix it? I gotr this stack trace from woocommerce log page

2024-06-26T15:34:28+00:00 CRITICAL Uncaught Error: Call to undefined method GuzzleHttp\Utils::chooseHandler() in /home/u159033492/domains/gameheaven.net/public_html/wp-content/plugins/custom-woocomrace-shop-nagad-bkush/vendor/guzzlehttp/guzzle/src/functions.php:61 Stack trace: #0 /home/u159033492/domains/gameheaven.net/public_html/wp-content/plugins/backwpup/vendor/guzzlehttp/guzzle/src/HandlerStack.php(42): GuzzleHttp\choose_handler() #1 /home/u159033492/domains/gameheaven.net/public_html/wp-content/plugins/backwpup/vendor/guzzlehttp/guzzle/src/Client.php(65): GuzzleHttp\HandlerStack::create() #2 /home/u159033492/domains/gameheaven.net/public_html/wp-content/plugins/custom-woocomrace-shop-nagad-bkush/vendor/pusher/pusher-php-server/src/Pusher.php(121): GuzzleHttp\Client->__construct() #3 /home/u159033492/domains/gameheaven.net/public_html/wp-content/plugins/custom-woocomrace-shop-nagad-bkush/custom-woocomrace-shop-nagad-bkush.php(188): Pusher\Pusher->__construct() #4 /home/u159033492/domains/gameheaven.net/public_html/wp-includes/class-wp-hook.php(326): action_woocommerce_update_order() #5 /home/u159033492/domains/gameheaven.net/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() #6 /home/u159033492/domains/gameheaven.net/public_html/wp-includes/plugin.php(517): WP_Hook->do_action() #7 /home/u159033492/domains/gameheaven.net/public_html/wp-content/plugins/woocommerce/includes/data-stores/class-wc-order-data-store-cpt.php(196): do_action() #8 /home/u159033492/domains/gameheaven.net/public_html/wp-content/plugins/woocommerce/includes/class-wc-data-store.php(196): WC_Order_Data_Store_CPT->update() #9 /home/u159033492/domains/gameheaven.net/public_html/wp-content/plugins/woocommerce/includes/abstracts/abstract-wc-order.php(212): WC_Data_Store->update() #10 /home/u159033492/domains/gameheaven.net/public_html/wp-content/plugins/woocommerce/includes/class-wc-order.php(252): WC_Abstract_Order->save() #11 /home/u159033492/domains/gameheaven.net/public_html/wp-content/plugins/woo-wallet/includes/class-woo-wallet-payment-method.php(163): WC_Order->save() #12 /home/u159033492/domains/gameheaven.net/public_html/wp-includes/class-wp-hook.php(326): Woo_Gateway_Wallet_payment->woocommerce_pre_payment_complete() #13 /home/u159033492/domains/gameheaven.net/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() #14 /home/u159033492/domains/gameheaven.net/public_html/wp-includes/plugin.php(517): WP_Hook->do_action() #15 /home/u159033492/domains/gameheaven.net/public_html/wp-content/plugins/woocommerce/includes/class-wc-order.php(137): do_action() #16 /home/u159033492/domains/gameheaven.net/public_html/wp-content/plugins/woo-wallet/includes/class-woo-wallet-payment-method.php(142): WC_Order->payment_complete() #17 /home/u159033492/domains/gameheaven.net/public_html/wp-content/plugins/woocommerce/includes/class-wc-checkout.php(1050): Woo_Gateway_Wallet_payment->process_payment() #18 /home/u159033492/domains/gameheaven.net/public_html/wp-content/plugins/woocommerce/includes/class-wc-checkout.php(1279): WC_Checkout->process_order_payment() #19 /home/u159033492/domains/gameheaven.net/public_html/wp-content/plugins/woocommerce/includes/class-wc-ajax.php(508): WC_Checkout->process_checkout() #20 /home/u159033492/domains/gameheaven.net/public_html/wp-includes/class-wp-hook.php(324): WC_AJAX::checkout() #21 /home/u159033492/domains/gameheaven.net/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() #22 /home/u159033492/domains/gameheaven.net/public_html/wp-includes/plugin.php(517): WP_Hook->do_action() #23 /home/u159033492/domains/gameheaven.net/public_html/wp-content/plugins/woocommerce/includes/class-wc-ajax.php(96): do_action() #24 /home/u159033492/domains/gameheaven.net/public_html/wp-includes/class-wp-hook.php(324): WC_AJAX::do_wc_ajax() #25 /home/u159033492/domains/gameheaven.net/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() #26 /home/u159033492/domains/gameheaven.net/public_html/wp-includes/plugin.php(517): WP_Hook->do_action() #27 /home/u159033492/domains/gameheaven.net/public_html/wp-includes/template-loader.php(13): do_action() #28 /home/u159033492/domains/gameheaven.net/public_html/wp-blog-header.php(19): require_once('/home/u15903349...') #29 /home/u159033492/domains/gameheaven.net/public_html/index.php(17): require('/home/u15903349...') #30 {main} thrown in /home/u159033492/domains/gameheaven.net/public_html/wp-content/plugins/custom-woocomrace-shop-nagad-bkush/vendor/guzzlehttp/guzzle/src/functions.php on line 61