[Waiting for user confirmation] Split: where is lost all Finnish

Looking at the debug information you provided, I can see that both WPML and WordPress are outdated.

Please update your WPML plugins and add-ons to the latest version (4.9.2) to benefit from recent bug fixes and improvements. While this may not necessarily resolve the issue, it’s important to troubleshoot using the most up-to-date version.

You can download the latest versions from My Account → Downloads on wpml.org. Instructions for updating are available here:
http://wpml.org/faq/install-wpml/

If you don’t see the updates in your dashboard, please go to:
Plugins → Add New → Commercial tab and click “Check for updates.”

Additionally, please make sure to:
• Update WordPress core
• Update your active theme (if needed)
• Update any relevant plugins

If the issue persists after updating, please enable debug logging in WordPress so we can capture any errors for further analysis.

Here are the steps:
1. Enable WordPress debugging by editing your wp-config.php file. Add (or modify, if these lines already exist) the following lines before the comment /* That's all, stop editing! Happy publishing. */:

define( 'WP_DEBUG', true );
define( 'WP_DEBUG_LOG', true );
define( 'WP_DEBUG_DISPLAY', false );

2. Replicate the error.
3. Check the debug.log file (located in the /wp-content/debug.log) for any WPML-related errors.
4. Copy and paste the full error message here.

Before making any changes, please ensure you create a full backup of your database.