CodeIgniter 4.3.4迁移至4.5.1时Logger类未找到报错

我正在将代码从CodeIgniter 4.3.4迁移到4.5.1版本，网页运行时出现致命错误：Class "CodeIgniter\Log\Logger" not found，但自动化测试环境下无此报错。

错误回溯信息 #

Fatal error:  Uncaught Error: Class "CodeIgniter\Log\Logger" not found in /var/www/html/project/system_4.5.1/Config/Services.php:403
Stack trace:
#0 /var/www/html/project/system_4.5.1/Config/BaseService.php(311): CodeIgniter\Config\Services::logger()
#1 /var/www/html/project/system_4.5.1/Config/BaseService.php(250): CodeIgniter\Config\BaseService::__callStatic()
#2 /var/www/html/project/system_4.5.1/Config/Services.php(400): CodeIgniter\Config\BaseService::getSharedInstance()
#3 /var/www/html/project/system_4.5.1/Config/BaseService.php(311): CodeIgniter\Config\Services::logger()
#4 /var/www/html/project/system_4.5.1/Config/BaseService.php(201): CodeIgniter\Config\BaseService::__callStatic()
#5 /var/www/html/project/system_4.5.1/Common.php(998): CodeIgniter\Config\BaseService::get()
#6 /var/www/html/project/system_4.5.1/Common.php(785): service()
#7 /var/www/html/project/system_4.5.1/Debug/Exceptions.php(135): log_message()
#8 /var/www/html/project/system_4.5.1/Debug/Exceptions.php(252): CodeIgniter\Debug\Exceptions->exceptionHandler()
#9 [internal function]: CodeIgniter\Debug\Exceptions->shutdownHandler()
#10 {main}
  thrown in /var/www/html/project/system_4.5.1/Config/Services.php on line 403

我已经检查了所有相关配置文件，未发现异常，但CodeIgniter始终找不到实际存在的Logger类。

为进一步排查，我修改了4.5.1版本Config\Services中的logger()方法，添加了打印当前已加载文件的代码，结果证实Logger类确实未被加载：

public static function logger(bool $getShared = true)
{
    print'<pre>';print_r(get_included_files());print'</pre>';
    print'<pre>';print_r($log);print'</pre>';exit;

    if ($getShared) {
        return static::getSharedInstance('logger');
    }

    return new Logger(config(LoggerConfig::class));
}

内容的提问来源于stack exchange，提问作者Antony