Fatal error

Hello,

Hope you are doing well,
When clicking on the PLACE ORDER button, I get the following error:

Fatal error: Uncaught Error: Call to a member function get_total() on bool in /homepages/3/d435371766/htdocs/mywebsite/wp-content/plugins/woocommerce/includes/abstracts/abstract-wc-payment-gateway.php:265 Stack trace: #0 /homepages/3/d435371766/htdocs/mywebsite/wp-content/plugins/woocommerce/includes/abstracts/abstract-wc-payment-gateway.php(283): WC_Payment_Gateway->get_order_total() #1 /homepages/3/d435371766/htdocs/mywebsite/wp-content/plugins/woocommerce/includes/class-wc-payment-gateways.php(151): WC_Payment_Gateway->is_available() #2 /homepages/3/d435371766/htdocs/mywebsite/wp-content/plugins/woocommerce/includes/wc-account-functions.php(118): WC_Payment_Gateways->get_available_payment_gateways() #3 /homepages/3/d435371766/htdocs/mywebsite/wp-content/themes/Avada/includes/avada-functions.php(477): wc_get_account_menu_items() #4 /homepages/3/d435371766/htdocs/mywebsite/wp-includes/class-wp-hook.php(288): avada_add_login_box_to_nav(‘<li id=”menu-i…’, Object(stdClass)) #5 /homepages/3/d435371766/htdocs/mywebsite/wp-includes/plugin.php(206): WP_Hook-> in /homepages/3/d435371766/htdocs/mywebsite/wp-content/plugins/woocommerce/includes/abstracts/abstract-wc-payment-gateway.php on line 265

How should I proceed?
Please advise,
Thanks