Problema:
Client could not update product stock via CSV import because WooCommerce Multilingual & Multicurrency triggered a fatal error (`Array callback must have exactly two elements` in `Post.php`). With the plugin active, imports failed completely; when disabled, only partial updates worked with SKU duplication errors.
Solución:
Support tested on a site copy, identified faulty code in `Post.php` (line 69), and provided a manual fix: replace
Problem: The client experienced an error updating product stock after updating the WooCommerce Multilingual & Multicurrency plugin. The error occurred when importing products using a CSV file with 'id' and 'stock' columns, which previously worked without issues. Solution: 1. We asked the client to verify if the stock values being negative was correct, as the import file contained products with negative stock. 2. We suggested deactivating the WooCommerce Multilingual plugin to check if the issue still occurred, helping to identify if the plugin was the cause. 3. We updated outdated plugins and themes and fixed a minor configuration issue in WooCommerce Multilingual. We then asked the client to check if the problem was resolved.
If this solution does not resolve your issue, or if it seems outdated or irrelevant to your case, we recommend opening a new support ticket. We also highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. For further assistance, please visit our support forum at https://wpml.org/forums/forum/spanish-support/.
