Sites are not accessible: Error HTTP 500.0 – Internal Server Error

Symptoms

• Trying to access a domain website shows the following error:

  HTTP Error 500.0 - external Server Error
  C:Program FilesParallelsPleskAdditionalPleskPHP72php-cgi.exe - The FastCGI process exited unexpectedly

  Detailed Error Information:
  Module FastCgiModule
  Notification ExecuteRequestHandler
  Handler PHP-php
  Error Code 0xfffffffe
  Requested URL https://example.com:443/index.php
  Physical Path C:Inetpubvhostsexample.comhttpdocsindex.php

• Repairing the permissions for the C:WindowsTemp directory does not resolve the issue:

  C:> C:UsersAdministrador>plesk repair --directory-permissions -directory "C:WindowsTemp"
  Permissions were fixed for directory "C:WindowsTemp"

• Disabling OPcache module in Tools & Settings > PHP settings for the php version reported by the error, allows the sites to work again:

  

Cause

One or more necessary cache files in C:WindowsTemp are corrupted.

Resolution

1. Connect to the server using RDP;

2. Navigate to C:WindowsTemp;

3. Clean the directory;

4. Restart IIS:

   C:> C:> iisreset