Fatal error line 1438

Hi there

My site is crashing and causing a server reboot on godaddy most days. Here’s the recent stack trace. Any ideas how to fix?

[01-Nov-2021 11:11:43 UTC] PHP Fatal error:  Uncaught Error: Call to a member function get_cart_contents_count() on null in /home/.../public_html/wp-content/plugins/woo-fly-cart/wpc-fly-cart.php:1348
Stack trace:
#0 /home/.../public_html/wp-content/plugins/woo-fly-cart/wpc-fly-cart.php(1410): WPCleverWoofc->woofc_get_cart_menu()
#1 /home/.../public_html/wp-includes/class-wp-hook.php(303): WPCleverWoofc->woofc_nav_menu_items('<li id="menu-it...', Object(stdClass))
#2 /home/fairview1/public_html/wp-includes/plugin.php(189): WP_Hook->apply_filters('<li id="menu-it...', Array)
#3 /home/.../public_html/wp-includes/nav-menu-template.php(259): apply_filters('wp_nav_menu_ite...', '<li id="menu-it...', Object(stdClass))
#4 /home/fairview1/public_html/wp-content/themes/fairviewna-2020/header.php(271): wp_nav_menu(Object(stdClass))
#5 /home/.../public_html/wp-includes/template.php(770): require_once('/home/fairview1...')
#6 /home/.../public_html/wp-includes/template.php(716): load_template('/home/fairview1...', true, Array)
#7 / in /home/fairview1/public_html/wp-content/plugins/woo-fly-cart/wpc-fly-cart.php on line 1348
[01-Nov-2021 11:11:47 UTC] PHP Fatal error:  Uncaught Error: Call to a member function get_cart_contents_count() on null in /home/fairview1/public_html/wp-content/plugins/woo-fly-cart/wpc-fly-cart.php:1348
Stack trace:
#0 /home/.../public_html/wp-content/plugins/woo-fly-cart/wpc-fly-cart.php(1410): WPCleverWoofc->woofc_get_cart_menu()
#1 /home/.../public_html/wp-includes/class-wp-hook.php(303): WPCleverWoofc->woofc_nav_menu_items('<li id="menu-it...', Object(stdClass))
#2 /home/.../public_html/wp-includes/plugin.php(189): WP_Hook->apply_filters('<li id="menu-it...', Array)
#3 /home/.../public_html/wp-includes/nav-menu-template.php(259): apply_filters('wp_nav_menu_ite...', '<li id="menu-it...', Object(stdClass))
#4 /home/.../public_html/wp-content/themes/fairviewna-2020/header.php(271): wp_nav_menu(Object(stdClass))
#5 /home/.../public_html/wp-includes/template.php(770): require_once('/home/fairview1...')
#6 /home/.../public_html/wp-includes/template.php(716): load_template('/home/fairview1...', true, Array)
#7 / in /home/.../public_html/wp-content/plugins/woo-fly-cart/wpc-fly-cart.php on line 1348