There are many reasons that can cause the DIVI editor to loading for ever.
One of them is a simple and very common code that moves the WooCommerce tabs under i.e. short description, or another position.
Code looks like the code below and is located inside functions.php, or on custom css js plugins:
// Move the WooCommerce tabs under short description
remove_action( 'woocommerce_after_single_product_summary', 'woocommerce_output_product_data_tabs', 10 );
add_action( 'woocommerce_single_product_summary', 'woocommerce_output_product_data_tabs', 60 );So in order to solve the problem you must remove the above code.
A quick jQuery workaround can be:
// Move the WooCommerce tabs under short description.
jQuery(document).ready(function(){
jQuery('.single-product #left-area .woocommerce-tabs').insertAfter('.single-product #left-area .product_meta');
});