Linux， PHP 8.2 - mbstring 警告运行 Laravel dev 服务器

问：

我在 ElementaryOS（基本上是 Ubuntu）上并安装了 PHP 8.2。我正在尝试获取mbstring扩展。当我安装它时，它说我已经拥有它：

$ sudo apt-get install php8.2-mbstring
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
php8.2-mbstring is already the newest version (8.2.12-1+ubuntu22.04.1+deb.sury.org+1).
The following packages were automatically installed and are no longer required:
  javascript-common libc-ares2 libjs-highlight.js libnode72 nodejs-doc
Use 'sudo apt autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 435 not upgraded.

但是，phpinfo 说它被禁用了：

Multibyte decoding support using mbstring   disabled 

我在我的网站上收到了与没有此扩展程序相关的错误。

我在php.ini文件中取消了注释，现在它说它已启用。但是，启动 Laravel 开发服务器会发出以下警告：;extension=mbstring

$ php artisan serve
PHP Warning:  Module "mbstring" is already loaded in Unknown on line 0

   WARN  PHP Warning: Module "mbstring" is already loaded in Unknown on line 0.  

   INFO  Server running on [http://127.0.0.1:8000].  

  Press Ctrl+C to stop the server

这个警告是什么意思，有没有办法摆脱它，但仍然使用 mbstring？