PHP Warning: require(D:\56crm\thinkphp\start.php): failed to open stream: Permission denied in D:\56crm\public\index.php on line 19

PHP Warning: require(D:\56crm\thinkphp\start.php): failed to open stream: Permission denied in D:\56crm\public\index.php on line 19

PHP Fatal error: require(): Failed opening required 'D:\56crm\public/../thinkphp/start.php' (include_path='.;C:\php\pear') in D:\56crm\public\index.php on line 19

服务器使用的是IIS 7 + thinkphp 5 + php 5.6，我把服务器进程中的php-cgi.exe进程结束后，当前的url能访问到，但再次刷新又不行了。

将thinkphp项目部署到服务器上报这个错，恳求各位大佬多多指教，解决后定有重谢。