Deprecated used

Here error of wpstackable on my WordPress :

Deprecated: Unparenthesizeda ? b : c ? d : eis deprecated. Use either(a ? b : c) ? d : eora ? b : (c ? d : e)in /homepages/22/d464471741/htdocs/wp/wp-content/plugins/stackable-ultimate-gutenberg-blocks/src/init.php on line 119

Warning: Cannot modify header information - headers already sent by (output started at /homepages/22/d464471741/htdocs/wp/wp-content/plugins/stackable-ultimate-gutenberg-blocks/src/init.php:119) in /homepages/22/d464471741/htdocs/wp/wp-includes/functions.php on line 6029

Warning: Cannot modify header information - headers already sent by (output started at /homepages/22/d464471741/htdocs/wp/wp-content/plugins/stackable-ultimate-gutenberg-blocks/src/init.php:119) in /homepages/22/d464471741/htdocs/takt-mediation/wp-admin/includes/misc.php on line 1252

Warning: Cannot modify header information - headers already sent by (output started at /homepages/22/d464471741/htdocs/wp/wp-content/plugins/stackable-ultimate-gutenberg-blocks/src/init.php:119) in /homepages/22/d464471741/htdocs/takt-mediation/wp-admin/admin-header.php on line 9