[Closed] Edit home page et change the setting in wordpress

Background of the issue:
I am trying to edit my home page in WordPress, but I encounter an error. The issue can be seen at the following link: hidden link

Symptoms:
Erreur de la base de données WordPress : [Subquery returns more than 1 row] SELECT element_id, language_code FROM wpc0_icl_translations WHERE trid = (SELECT trid FROM wpc0_icl_translations WHERE element_type = 'post_page' AND element_id = (SELECT option_value FROM wpc0_options WHERE option_name='page_on_front' LIMIT 1)). Fatal error: Uncaught InvalidArgumentException: No translation entry found for query: s:42:" element_id = %d AND element_type LIKE %s ";a:2:{i:0;s:1:"9";i:1;s:5:"post%";} in /home/global08/public_html/wp-content/plugins/sitepress-multilingual-cms/classes/records/class-wpml-tm-icl-translations.php:193. The home page is duplicated three times on the front side.

Questions:
How can I resolve the database error when editing the home page?
Why is the home page duplicated three times on the front side?