[Resolved] fatal error using WooCommerce Multilingual & Multicurrency

Problem:

The client experienced a fatal error when switching to English to create posts in WordPress, causing the site and dashboard to crash. This issue occurred when both WooCommerce Multilingual & Multicurrency and WooCommerce PayPal Checkout Gateway plugins were active.

Solution:

We identified that the issue was due to a compatibility problem between WooCommerce PayPal Checkout Gateway and the Classic Editor plugin. To resolve this, we recommended:

1. Keeping the Classic Editor plugin active.
2. Ensuring that WooCommerce PayPal Payments is updated and configured correctly, replacing the unsupported WooCommerce PayPal Checkout Gateway.
3. Upgrading to the latest version of WooCommerce Multilingual & Multicurrency, which includes improvements that might resolve the issue.
4. Testing the site after these adjustments to confirm if the fatal error is resolved.

If this solution does not apply to your case, or if it seems outdated, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have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.