Fatal Error

After customizing Widget on Footer, I had an Error message ( see below), and this message is still available at the footer of the site (www.eagleeyeprod.fr) I don't any issue in the site Could you, please, how to cancel this error message ? Fatal error: Uncaught ArgumentCountError: Too few arguments to function SQ_Models_Frontend::getBuffer(), 1 passed in /homepages/6/d797102710/htdocs/wp-includes/class-wp-hook.php on line 288 and exactly 2 expected in /homepages/6/d797102710/htdocs/wp-content/plugins/squirrly-seo/models/Frontend.php:56 Stack trace: #0 /homepages/6/d797102710/htdocs/wp-includes/class-wp-hook.php(288): SQ_Models_Frontend->getBuffer('') #1 /homepages/6/d797102710/htdocs/wp-includes/class-wp-hook.php(312): WP_Hook->apply_filters(NULL, Array) #2 /homepages/6/d797102710/htdocs/wp-includes/plugin.php(478): WP_Hook->do_action(Array) #3 /homepages/6/d797102710/htdocs/wp-includes/load.php(947): do_action('shutdown') #4 [internal function]: shutdown_action_hook() #5 {main} thrown in /homepages/6/d797102710/htdocs/wp-content/plugins/squirrly-seo/models/Frontend.php on line 56