Problem: You are trying to export translations to XLIFF using WPML and encountering an 'export to .xliif failed' error, a 500 AJAX error, and an 'invalid site key' message, despite the site key being valid. Solution: We found a fatal error in your logs indicating issues with sending a file during the export process. This might be due to conflicts with your child theme. Here are the steps we recommend: 1. On your staging site, switch to the parent theme. 2. Try to download the XLIFF file again. 3. If the problem resolves, it suggests that your child theme's code is causing the conflict. You will need to identify and adjust the problematic code.
If this solution does not resolve your issue or seems outdated, please check for related known issues at https://wpml.org/known-issues/, verify the version of the permanent fix, and ensure you have installed the latest versions of themes and plugins. If problems persist, we highly recommend opening a new support ticket at WPML support forum.
