Can’t change Woocommerce order status

Any change of order status from within the individual order page will result in this error:

Fatal error: Uncaught Error: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "save_meta_box" not found or invalid function name
in /home/u557061162/domains/bookaholicsanonymous.com/public_html/wp-includes/class-wp-hook.php on line 308

Call stack:

WP_Hook::apply_filters()
wp-includes/class-wp-hook.php:332
WP_Hook::do_action()
wp-includes/plugin.php:517
do_action()
wp-content/plugins/woocommerce/includes/admin/class-wc-admin-meta-boxes.php:277
WC_Admin_Meta_Boxes::save_meta_boxes()
wp-includes/class-wp-hook.php:310
WP_Hook::apply_filters()
wp-includes/class-wp-hook.php:332
WP_Hook::do_action()
wp-includes/plugin.php:517
do_action()
wp-includes/post.php:4717
wp_insert_post()
wp-includes/post.php:4819
wp_update_post()
wp-admin/includes/post.php:426
edit_post()
wp-admin/post.php:227

Many other functions like using the WordPress Customizer and HeadBuilder functions will also result in similar critical/fatal error messages.

I’ve tried disabling plugins one by one but nothing seems to resolve this issue.