CodeIgniter 4 频繁出现‘Class "file" not found’关键错误求助

服务器上运行的CodeIgniter 4应用，日志里频繁出现critical级错误，每日发生超20次，但本地开发环境从未遇到该问题。出现错误后刷新1次或多次，应用即可恢复正常，求帮忙排查解决。

错误栈信息如下：

Class "file" not found

in SYSTEMPATH\Config\Services.php on line 667.
 1 SYSTEMPATH\Config\BaseService.php(252): CodeIgniter\Config\Services::session(Object(Config\App), false)
 2 SYSTEMPATH\Config\BaseService.php(193): CodeIgniter\Config\BaseService::__callStatic('session', [...])
 3 SYSTEMPATH\Config\Services.php(641): CodeIgniter\Config\BaseService::getSharedInstance('session', null)
 4 SYSTEMPATH\Config\BaseService.php(252): CodeIgniter\Config\Services::session()
 5 SYSTEMPATH\Common.php(988): CodeIgniter\Config\BaseService::__callStatic('session', [])
 6 APPPATH\Filters\UsersAuthFilter.php(13): session()
 7 SYSTEMPATH\Filters\Filters.php(173): App\Filters\UsersAuthFilter->before(Object(CodeIgniter\HTTP\IncomingRequest), null)
 8 SYSTEMPATH\CodeIgniter.php(473): CodeIgniter\Filters\Filters->run('/', 'before')
 9 SYSTEMPATH\CodeIgniter.php(368): CodeIgniter\CodeIgniter->handleRequest(null, Object(Config\Cache), false)
10 FCPATH\index.php(67): CodeIgniter\CodeIgniter->run()

错误截图：

内容的提问来源于stack exchange，提问作者Ridwan Pranata