Error message

• Deprecated function: session_set_save_handler(): Providing individual callbacks instead of an object implementing SessionHandlerInterface is deprecated in drupal_session_initialize() (line 245 of /var/www/vhosts/dagrafix.com/httpdocs/includes/session.inc).
• Deprecated function: xmlsitemap_sitemap_load_by_context(): Implicitly marking parameter $context as nullable is deprecated, the explicit nullable type must be used instead in include_once() (line 1439 of /var/www/vhosts/dagrafix.com/httpdocs/includes/bootstrap.inc).
• Deprecated function: xmlsitemap_get_directory(): Implicitly marking parameter $sitemap as nullable is deprecated, the explicit nullable type must be used instead in include_once() (line 1439 of /var/www/vhosts/dagrafix.com/httpdocs/includes/bootstrap.inc).
• Deprecated function: xmlsitemap_check_directory(): Implicitly marking parameter $sitemap as nullable is deprecated, the explicit nullable type must be used instead in include_once() (line 1439 of /var/www/vhosts/dagrafix.com/httpdocs/includes/bootstrap.inc).
• Deprecated function: xmlsitemap_clear_directory(): Implicitly marking parameter $sitemap as nullable is deprecated, the explicit nullable type must be used instead in include_once() (line 1439 of /var/www/vhosts/dagrafix.com/httpdocs/includes/bootstrap.inc).