Critical Error in Product Edit screen

sorpresa

Hi ATUM Team,

I am experiencing a critical error on the product edit pages in the backend of my WooCommerce shops. The error breaks the rendering of the page, making product description fields and other meta boxes invisible.

I have narrowed it down to ATUM Stock Manager version 1.9.55. When the plugin is deactivated, the issue disappears.

Error Details:
Uncaught Error: Call to undefined method WC_Product_Simple::get_supplier_id() in .../wp-content/plugins/atum-stock-manager-for-woocommerce/classes/MetaBoxes/ProductDataMetaBoxes.php:419

Full error log:

2026-05-03T10:02:16+00:00 Kritieke Uncaught Error: Call to undefined method WC_Product_Simple::get_supplier_id() in /home/sorpresa/domains/sorpresafashion.nl/public_html/wp-content/plugins/atum-stock-manager-for-woocommerce/classes/MetaBoxes/ProductDataMetaBoxes.php:419  
Aanvullende context
{
    "error": {
        "type": 1,
        "file": "/home/sorpresa/domains/sorpresafashion.nl/public_html/wp-content/plugins/atum-stock-manager-for-woocommerce/classes/MetaBoxes/ProductDataMetaBoxes.php",
        "line": 419
    },
    "remote-logging": true,
    "backtrace": [
        "",
        "#0 /home/sorpresa/domains/sorpresafashion.nl/public_html/wp-includes/class-wp-hook.php(341): Atum\MetaBoxes\ProductDataMetaBoxes->add_product_supplier_fields()",
        "#1 /home/sorpresa/domains/sorpresafashion.nl/public_html/wp-includes/class-wp-hook.php(365): WP_Hook->apply_filters()",
        "#2 /home/sorpresa/domains/sorpresafashion.nl/public_html/wp-includes/plugin.php(522): WP_Hook->do_action()",
        "#3 /home/sorpresa/domains/sorpresafashion.nl/public_html/wp-content/plugins/woocommerce/includes/admin/meta-boxes/views/html-product-data-inventory.php(202): do_action()",
        "#4 /home/sorpresa/domains/sorpresafashion.nl/public_html/wp-content/plugins/woocommerce/includes/admin/meta-boxes/class-wc-meta-box-product-data.php(49): include('...')",
        "#5 /home/sorpresa/domains/sorpresafashion.nl/public_html/wp-content/plugins/woocommerce/includes/admin/meta-boxes/views/html-product-data-panel.php(52): WC_Meta_Box_Product_Data::output_tabs()",
        "#6 /home/sorpresa/domains/sorpresafashion.nl/public_html/wp-content/plugins/woocommerce/includes/admin/meta-boxes/class-wc-meta-box-product-data.php(39): include('...')",
        "#7 /home/sorpresa/domains/sorpresafashion.nl/public_html/wp-admin/includes/template.php(1453): WC_Meta_Box_Product_Data::output()",
        "#8 /home/sorpresa/domains/sorpresafashion.nl/public_html/wp-admin/edit-form-advanced.php(721): do_meta_boxes()",
        "#9 /home/sorpresa/domains/sorpresafashion.nl/public_html/wp-admin/post.php(206): require('...')",
        "#10 {main}",
        "thrown"
    ]
}

Environment context:
ATUM version: 1.9.55
WooCommerce version: 10.7.0
WordPress version: 6.9.4
PHP version: Tested on 8.3.30 and 8.5.5 (same result)
HPOS: Enabled (High-Performance Order Storage). I have also tried enabling the Compatibility Mode (data sync), but the error persists.

The error seems to occur when ATUM attempts to load the supplier fields in the inventory tab of the product data meta box. It appears the method get_supplier_id() is being called on a standard WooCommerce product object where it isn't defined or hasn't been properly injected.

Could you please look into this compatibility issue with the latest WooCommerce/HPOS updates?

Best regards,

John Gerritse
Sorpresa Shop

Salva

Hi sorpresa

We've seen this issue happening sometimes on sites using object cache (mainly WP Engine-hosted sites).
Recently, we added a new option to fix this issue.
To try it, go to ATUM Settings >> Advanced and enable the option "Disable ATUM orders' object caching" and save.

And let us know if that fixed your issue.

Best Regards,
Salva.

FlyingEye

Hi , i have the same problem and do the setting modification but the fatal error continue. are you other solution. thanks !

Salva

Hi FlyingEye

Is your error happening on the same exact line?

ProductDataMetaBoxes.php:419?

FlyingEye

Hi @Salva , yes

`Uncaught Error: Call to undefined method WC_Product_Simple::get_supplier_id()
in /wp-content/plugins/atum-stock-manager-for-woocommerce/classes/MetaBoxes/ProductDataMetaBoxes.php on line 419

Call stack:

Atum\MetaBoxes\ProductDataMetaBoxes::add_product_supplier_fields()
wp-includes/class-wp-hook.php:341
WP_Hook::apply_filters()
wp-includes/class-wp-hook.php:365
WP_Hook::do_action()
wp-includes/plugin.php:522
do_action()
wp-content/plugins/woocommerce/includes/admin/meta-boxes/views/html-product-data-inventory.php:202
include('/home/admin/public_h...t-data-inventory.php')
wp-content/plugins/woocommerce/includes/admin/meta-boxes/class-wc-meta-box-product-data.php:49
WC_Meta_Box_Product_Data::output_tabs()
wp-content/plugins/woocommerce/includes/admin/meta-boxes/views/html-product-data-panel.php:52
include('/home/admin/public_h...oduct-data-panel.php')
wp-content/plugins/woocommerce/includes/admin/meta-boxes/class-wc-meta-box-product-data.php:39
WC_Meta_Box_Product_Data::output()
wp-admin/includes/template.php:1453
do_meta_boxes()
wp-admin/edit-form-advanced.php:721
require('/home/admin/public_h...it-form-advanced.php')
wp-admin/post.php:206`

FlyingEye

@Salva you want i create new toppic for develope and not spam sorpresa ?

For more information i dont have just this error , all Helpers::get_atum_product result dont give the historic object and fonction

exp :
$productAtum = \Atum\Inc\Helpers::get_atum_product($product->get_id()); $productAtum->get_purchase_price(); <=== Uncaught Error: Call to undefined method WC_Product_Simple::get_purchase_price()
------
EDIT, Claude have a solution ... that work for me

/*----------  Prevent direct access  ----------*/
defined('ABSPATH') or die('Nope, not accessing this');

/* 
WooCommerce 10.5+ introduced a product instance caching layer (product_instance_caching feature flag) 
that returns cached WC_Product objects directly from WC_Product_Factory::get_product(), 
bypassing the woocommerce_product_class filter before it can fire. Since Helpers::get_atum_product() 
relies on that filter — temporarily registering it via Globals::enable_atum_product_data_models() around a wc_get_product() 
call — the cache hit causes WooCommerce to return a plain WC_Product_Simple instead of the expected ATUM subclass, 
resulting my fatal errors on get_purchase_price(), get_supplier_id(), etc.
Workaround: force the woocommerce_feature_product_instance_caching_enabled option to 'no' via pre_option_* filter.
*/
add_filter( 'pre_option_woocommerce_feature_product_instance_caching_enabled', function() { return 'no'; } );

Salva

FlyingEye

Oh, so have you enabled that experimental feature?
Perhaps that is causing the issue, of course.
We don't recommend enabling experimental features in production.

And you don't need to add the code Claude suggested to you. Just go to WooCommerce >> Settings >> Features and disable the "Cache Product Objects" option. That should make the same thing.

I hope this helps.

sorpresa

I've enabled the option, saved it and still had this issue. Then I disabled the last option of the experimental features, that tells Woo to cache productobjects. That did fix this issue.
I never enabled it, so it seems it was enabled automatically with a recent update.

Thanks, I can use ATUM again!

Salva

sorpresa

Good to know!
I don't think WooCommerce could activate an experimental feature on its own. That would be very dangerous... :)

JonasDK

Hi we experience the exact same - tried the object cache "thing" Not working.

Salva

Hi JonasDK

Which of the two options discussed in this thread did you try?
Do you have the product caching option from WooCommerce experimental features enabled or disabled?

Best Regards,
Salva.