Unsupported operand types: string *

Hello,

A client of ours has installed this plugin, not sure when it was installed.

WooCommerce is on the latest version.

When the client is updating the price of a product, he is getting the fatal error screen saying there is a problem and it’s been emailed to you.

When turning on debug logging and checking the log file, this is the fatal error that is being returned;

[22-Nov-2024 09:17:53 UTC] PHP Fatal error:  Uncaught TypeError: Unsupported operand types: string * float in /wordpress/plugins/woocommerce/9.4.2/includes/wc-formatting-functions.php:136
Stack trace:
#0 /srv/htdocs/wp-content/plugins/xml-for-google-merchant-center/classes/generation/traits-xfgmc-simple.php(1106): wc_get_dimension('', 'cm')
#1 /srv/htdocs/wp-content/plugins/xml-for-google-merchant-center/classes/generation/class-xfgmc-get-unit-offer-simple.php(117): XFGMC_Get_Unit_Offer_Simple->get_shipping_xml()
#2 /srv/htdocs/wp-content/plugins/xml-for-google-merchant-center/classes/generation/class-xfgmc-get-unit-offer.php(65): XFGMC_Get_Unit_Offer_Simple->generation_product_xml()
#3 /srv/htdocs/wp-content/plugins/xml-for-google-merchant-center/classes/generation/class-xfgmc-get-unit.php(115): XFGMC_Get_Unit_Offer->__construct(Array)
#4 /srv/htdocs/wp-content/plugins/xml-for-google-merchant-center/classes/generation/class-xfgmc-get-unit.php(64): XFGMC_Get_Unit->create_code()
#5 /srv/htdocs/wp-content/plugins/xml-for-google-merchant-center/classes/system/class-xml-for-google-merchant-center.php(650): XFGMC_Get_Unit->__construct(31648, 1)
#6 /wordpress/core/6.7.1/wp-includes/class-wp-hook.php(324): XmlforGoogleMerchantCenter->xfgmc_save_post_product_function(31648, Object(WP_Post), true)
#7 /wordpress/core/6.7.1/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(false, Array)
#8 /wordpress/core/6.7.1/wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#9 /wordpress/core/6.7.1/wp-includes/post.php(5060): do_action('save_post', 31648, Object(WP_Post), true)
#10 /wordpress/core/6.7.1/wp-includes/post.php(5162): wp_insert_post(Array, false, true)
#11 /wordpress/core/6.7.1/wp-admin/includes/post.php(453): wp_update_post(Array)
#12 /wordpress/core/6.7.1/wp-admin/post.php(227): edit_post()
#13 {main}
  thrown in /wordpress/plugins/woocommerce/9.4.2/includes/wc-formatting-functions.php on line 136

I’ve tried rolling back the plugin to a previous version but that is bringing back the same error too.

When deactivating the plugin and then updating the product price in the backend, it works as normal, no errors.

When the plugin is activated and the price is updated in the backend, it shows the fatal error message screen HOWEVER the price on the frontend is being reflected.

Please can you take a look into this for me?

Let me know what information you would require from me.

Thanks,
Javed

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