Problem: The client was experiencing an issue where the 'Translate Link Targets' button in the WPML settings was not functioning, accompanied by a JavaScript TypeError in the console indicating a null property read. This issue persisted even after disabling all plugins except WPML. Solution: We first recommended increasing the WP Memory Limit to at least 128MB, ideally 256MB, by adding the following lines to the wp-config.php file:
Afterwards, we suggested switching to a default theme like Twenty Twenty-One and enabling only WPML and String Translation plugins to check if the issue was caused by a theme conflict. If the problem was resolved, the client was advised to reactivate other plugins one by one to identify the problematic plugin. If these steps did not resolve the issue, we requested temporary access to the client's site for further investigation.
Please note that this solution might be outdated or not applicable to your specific case.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 problem persists, please open a new support ticket at WPML support forum.
