Message d'erreur

• Deprecated function: Drupal\form_builder\FormBase implements the Serializable interface, which is deprecated. Implement __serialize() and __unserialize() instead (or in addition, if support for old PHP versions is necessary) in require_once() (line 5 of /home/snptesorjf/petition/profiles/yakforms_profile/modules/form_builder/src/FormBase.php).
• Warning: Cannot modify header information - headers already sent by (output started at /home/snptesorjf/petition/includes/common.inc:2861) in drupal_send_headers() (line 1551 of /home/snptesorjf/petition/includes/bootstrap.inc).
• TypeError: DateTime::setTimestamp(): Argument #1 ($timestamp) must be of type int, DateTime given in DateTime->setTimestamp() (line 675 of /home/snptesorjf/petition/profiles/yakforms_profile/modules/yakforms/yakforms.module).