Error with PHP 8.1

Fatal error: Uncaught ValueError: Unknown format specifier “S” in C:\Server\Xampp-7.4.7\htdocs\xxx\complete-bootstrap-4-shortcodes\bootstrap-shortcodes.php:512 Stack trace: #0 C:\Server\Xampp-7.4.7\htdocs\realwp.net\addons\complete-bootstrap-4-shortcodes\bootstrap-shortcodes.php(512): sprintf(‘<a%S href=”%s”%…’, ”, ‘#’, ‘ class=”dropdow…’, ”, ‘Action’) #1 C:\Server\Xampp-7.4.7\htdocs\realwp.net\wp-includes\shortcodes.php(355): BootstrapShortcodes->bs_dropdown_item(Array, ‘Action’, ‘dropdown-item’) #2 [internal function]: do_shortcode_tag(Array) #3 C:\Server\Xampp-7.4.7\htdocs\realwp.net\wp-includes\shortcodes.php(227): preg_replace_callback(‘/\\[(\\[?)(dropdo…’, ‘do_shortcode_ta…’, ‘<div class=”dro…’) #4 C:\Server\Xampp-7.4.7\htdocs\realwp.net\addons\complete-bootstrap-4-shortcodes\bootstrap-shortcodes.php(622): do_shortcode(‘<div class=”dro…’) #5 C:\Server\Xampp-7.4.7\htdocs\realwp.net\wp-includes\shortcodes.php(355): BootstrapShortcodes->bs_dropdown_menu(Array, ‘<div class=”dro…’, ‘dropdown-menu’) #6 [internal function]: do_shortcode_tag(Array) #7 C:\Server\Xampp-7.4.7\htdocs\realwp.net\wp-includes\shortcodes.php(227): preg_replace_callback(‘/\\[(\\[?)(button…’, ‘do_shortcode_ta…’, ‘\n[button type=”…’) #8 C:\Server\Xampp-7.4.7\htdocs\realwp.net\addons\complete-bootstrap-4-shortcodes\bootstrap-shortcodes.php(482): do_shortcode(‘\n[button type=”…’) #9 C:\Server\Xampp-7.4.7\htdocs\realwp.net\wp-includes\shortcodes.php(355): BootstrapShortcodes->bs_dropdown(Array, ‘\n[button type=”…’, ‘dropdown’) #10 [internal function]: do_shortcode_tag(Array) #11 C:\Server\Xampp-7.4.7\htdocs\realwp.net\wp-includes\shortcodes.php(227): preg_replace_callback(‘/\\[(\\[?)(button…’, ‘do_shortcode_ta…’, ‘\n[dropdown]\n[bu…’) #12 C:\Server\Xampp-7.4.7\htdocs\realwp.net\addons\complete-bootstrap-4-shortcodes\bootstrap-shortcodes.php(995): do_shortcode(‘\n[dropdown]\n[bu…’) #13 C:\Server\Xampp-7.4.7\htdocs\realwp.net\wp-includes\shortcodes.php(355): BootstrapShortcodes->bs_card_body(Array, ‘\n[dropdown]\n[bu…’, ‘card-body’) #14 [internal function]: do_shortcode_tag(Array) #15 C:\Server\Xampp-7.4.7\htdocs\realwp.net\wp-includes\shortcodes.php(227): preg_replace_callback(‘/\\[(\\[?)(button…’, ‘do_shortcode_ta…’, ‘\n[card-header c…’) #16 C:\Server\Xampp-7.4.7\htdocs\realwp.net\addons\complete-bootstrap-4-shortcodes\bootstrap-shortcodes.php(948): do_shortcode(‘\n[card-header c…’) #17 C:\Server\Xampp-7.4.7\htdocs\realwp.net\wp-includes\shortcodes.php(355): BootstrapShortcodes->bs_card(Array, ‘\n[card-header c…’, ‘card’) #18 [internal function]: do_shortcode_tag(Array) #19 C:\Server\Xampp-7.4.7\htdocs\realwp.net\wp-includes\shortcodes.php(227): preg_replace_callback(‘/\\[(\\[?)(accord…’, ‘do_shortcode_ta…’, ‘<h2>Rows and Co…’) #20 C:\Server\Xampp-7.4.7\htdocs\realwp.net\wp-includes\class-wp-hook.php(308): do_shortcode(‘<h2>Rows and Co…’) #21 C:\Server\Xampp-7.4.7\htdocs\realwp.net\wp-includes\plugin.php(205): WP_Hook->apply_filters(‘<h2>Rows and Co…’, Array) #22 C:\Server\Xampp-7.4.7\htdocs\realwp.net\wp-includes\post-template.php(255): apply_filters(‘the_content’, ‘<h2>Rows and Co…’) #23 C:\Server\Xampp-7.4.7\htdocs\realwp.net\template\main\page.php(26): the_content() #24 C:\Server\Xampp-7.4.7\htdocs\realwp.net\wp-includes\template-loader.php(106): include(‘C:\\Server\\Xampp…’) #25 C:\Server\Xampp-7.4.7\htdocs\realwp.net\wp-blog-header.php(19): require_once(‘C:\\Server\\Xampp…’) #26 C:\Server\Xampp-7.4.7\htdocs\realwp.net\index.php(17): require(‘C:\\Server\\Xampp…’) #27 {main} thrown in?C:\Server\Xampp-7.4.7\htdocs\realwp.net\addons\complete-bootstrap-4-shortcodes\bootstrap-shortcodes.php?on line?512