Please, apologize for the delay in answering. We are a bit loaded lately, but working hard to get back to normal. Another colleague will take care of the ticket as soon as possible. Meanwhile, I would like to provide some hints and debugging steps to move things forward.
Try clearing the cache.
If this does not work, if it is possible for you, do the following test:
***Backup your site and DB before proceeding***
-Deactivate all the plugins but WPML and its add-ons, keep also WooCommerce and WooCommerce Multilingual
-Switch to a default WP theme (Twenty Sixteen for example)
-If the issue is gone, reactivate one at a time to see with which one is the conflict