It seems that you tried adding custom code for the tabs that is causing the issue.
Did you add any code snippets for the tabs?
If yes then try removing the code and then clear cache and check back.
If not then deactivate all the third party plugins and provide with the admin panel login details of the website to check it myself and help you out accordingly.
Hi you are right to Reorder product data tabs i added this code into function.php under woodmart-child
add_filter( ‘woocommerce_product_tabs’, ‘woo_reorder_tabs’, 98 );
function woo_reorder_tabs( $tabs ) {
$tabs[‘additional_information’][‘priority’] = 5; // Additional information first
$tabs[‘description’][‘priority’] = 10; // Description second
$tabs[‘reviews’][‘priority’] = 15; // Reviews third