PHP Error when renaming product tab

Hi,

I’ve discoved an issue when renaming the product tabs.

I’m using the recommended code documented by Woocommerce to do this, and this issue is documented for the ‘The Additional Information tab’:
https://docs.woocommerce.com/document/editing-product-data-tabs/#section-6

AH01071: Got error ‘PHP message: PHP Warning: call_user_func() expects parameter 1 to be a valid callback, no array or string given in /var/www/vhosts/domain.com/wp-content/themes/shopkeeper/woocommerce/single-product/tabs/tabs.php on line 73’

But using the recommended code:

// Rename product tabs
add_filter( ‘woocommerce_product_tabs’, ‘woo_rename_tabs’, 98 );
function woo_rename_tabs( $tabs ) {

global $product;

if( $product->has_attributes() || $product->has_dimensions() || $product->has_weight() ) { // Check if product has attributes, dimensions or weight
$tabs[‘additional_information’][‘title’] = __( ‘Bike Specifications’ ); // Rename the additional information tab
$tabs[‘description’][‘title’] = __( ‘Professional Reviews’ ); // Rename the description tab
$tabs[‘reviews’][‘title’] = __( ‘User Reviews’ ); // Rename the reviews tab
}

return $tabs;
}

There is no error if I just change the ‘additional_information’tab, but get the error if we add in renaming for description and reviews tabs.

Any ideas on what I should try changing?

Thanks
Alex