However... On all English language pages there is now a warning at the top of the page:
Notice: Function _load_textdomain_just_in_time was called incorrectly. Translation loading for the feeds-for-youtube domain was triggered too early. This is usually an indicator for some code in the plugin or theme running too early. Translations should be loaded at the init action or later. Please see Debugging in WordPress for more information. (This message was added in version 6.7.0.) in /home/u125144p121218/domains/staging.wingsforanimals.org/public_html/wp-includes/functions.php on line 6131
On the Dutch language pages there are no warnings. Dutch is the base language.
In your staging site, can you please try the following:
Disable all plugins except WPML-related and temporarily change the theme to a default WordPress, such as Twenty Twenty-five.
Is the issue resolved with these settings? If so, please reactivate one by one to see which conflicts.