Romain

Problem:
The client experiences a white screen when attempting to translate a string in WPML by navigating to WPML > Translations and clicking on a string. Despite enabling WP_DEBUG, no PHP errors are shown, only a JavaScript error related to 'cssRules' in the console.
Solution:
1. Enable WordPress debugging to capture any PHP errors that might not be displaying. Edit the wp-config.php file and insert the following lines:

Then, try to reproduce the issue.
2. Check for plugin or theme compatibility issues:
- Create a full backup of your website.
- Deactivate all plugins except for WPML and its add-ons.
- Switch to a default WordPress theme like TwentySeventeen.
- Test to see if the issue persists. If it does not, reactivate plugins one by one to identify the problematic plugin.
It's advisable to perform these tests in a staging environment if possible.

If these steps do not resolve the issue or if the solution seems outdated or irrelevant to your specific case, we recommend opening a new support ticket. Additionally, please check related known issues at https://wpml.org/known-issues/, verify the version of the permanent fix, and confirm that you have installed the latest versions of themes and plugins. For further assistance, visit our support forum at WPML Support Forum.