PHP 7.4 errors

I’m trying to update my cPanel/Wordpress PHP version from 7.2 to 7.4. When I update to 7.4 I get a ton of error messages like this:

Warning: preg_match(): Compilation failed: invalid range in character class at offset 4 in?/home/xxxxx/public_html/wp-content/plugins/lightbox-plus/classes/shd.class.php?on line?1384

Warning: preg_match_all(): Compilation failed: invalid range in character class at offset 4 in?/home/xxxxx/public_html/wp-content/plugins/lightbox-plus/classes/shd.class.php?on line?700

Warning: preg_match_all(): Compilation failed: invalid range in character class at offset 4 in?/home/xxxxx/public_html/wp-content/plugins/lightbox-plus/classes/shd.class.php?on line?707