Problem: After installing the WPML plugin on a WordPress site with WooCommerce and several other plugins, the client experienced significant slowdowns in managing WooCommerce orders and accessing the REST API. Despite attempts at database indexing and using object cache, the performance issues persisted, making the site almost unusable. Solution: We recommended that the client conduct specific tests to isolate whether the slowdown was solely due to WPML, a compatibility issue with another plugin, or another underlying cause. This step-by-step approach would help in identifying the precise problem and thereby facilitate a targeted solution. If the client finds that the performance issues continue after these tests, we suggest revisiting the configuration or potentially looking at alternative plugins for custom order statuses that might be causing conflicts.
Please note that this solution might be outdated or not applicable to your specific case. We 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. If the issue persists, please open a new support ticket at WPML support forum for further assistance.
