fastadmin php7.4报错

fastadmin php7.4报错 Array and string offset access syntax with curly braces is deprecated？

只倾心于那条鱼:

fastadmin的根目录下/thinkphp/library/think/db/Query.php

$seq = (ord($value{0}) % $rule['num']) + 1;

$seq = (ord($value[0]) % $rule['num']) + 1;