Problem: The client is experiencing an issue where the WPML String Translation plugin disables the preview rendering in the Cornerstone content editor. When the WPML plugin is deactivated, the content can be edited without issues. A PHP Fatal error related to DOMDocument::loadHTML() was found in the debug log. Solution: We recommend the following steps to resolve the issue: 1. Navigate to WPML >> String Translation. 2. Open the 'Auto register untranslated strings' section. 3. Select the 'Disable auto register of untranslated strings' option. 4. Click the 'Save Settings' button. 5. Clear all site/server/CDN caches and check if the Cornerstone preview works. If you're still experiencing issues or if this solution does not apply due to updates or changes, 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 for further assistance.
