I have encountered a critical problem with Page Builder on Magento 2.4.6-p6. Saving changes often fail on the second attempt due to CORS errors. Specifically, we see:
- CORS Error: Access to XMLHttpRequest at xxx from origin ‘null’ has been blocked by CORS policy.
- Page Builder Rendering Lock: [ERROR] Page Builder rendered for 5 seconds without releasing locks.
This results in a persistent “Please wait” loader that prevents us from saving modifications.
How to solve it?