WPML - Incomplete ATE Translation from Front-End Translation Link

Overview of the issue

If you use the Edit Translations link on the front-end for translating your content with the Advanced Translation Editor (ATE), translations may not complete and remain stuck. Additionally, you will see an error like the following:

Workaround

Please, make sure of having a full site backup of your site before proceeding.

• You should manage and complete translation jobs through the backend interface to ensure proper completion and synchronization from WPML > Translations dashboard.

Or:

• Open …/wp-content/plugins/sitepress-multilingual-cms/classes/filters/class-wpml-tm-translation-status-display.php file.
• Look for line 431.
• Replace:

  				if ( ! isset( $_SERVER['HTTP_REFERER'] ) ) {
  					return null;
  				}
  
  				$url = remove_query_arg( $args, $_SERVER['HTTP_REFERER'] );
  

• For:

  				$url = remove_query_arg( $args, admin_url('admin.php?page='. WPML_TM_FOLDER . '/menu/translations-queue.php') );