printf(): Too few arguments

Hi !
after test and desactive all my plugin one per one, i use Query Monitor to target why my website is slow.
i have this notification :
printf(): Too few arguments
detail :
do_action(‘admin_init’)
wp-admin/admin.php:156
um\a\c\Admin_Notices->create_list()
wp-includes/class-wp-hook.php:286
um\a\c\Admin_Notices->admin_notice_opt_in()
wp-content/plugins/ultimate-member/includes/admin/core/class-admin-notices.php:44
printf()
wp-content/plugins/ultimate-member/includes/admin/core/class-admin-notices.php:534
wp-content/plugins/ultimate-member/includes/admin/core/class-admin-notices.php:534

Please, what issue ?
thank,