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[HUB] 500 - Internal Server Error

Article ID: 114882, created on Oct 3, 2012, last review on Feb 20, 2015

APPLIES TO:
  • Plesk

Table of contents

Linux:

General troubleshooting steps

The reason of 500 error can be found in Plesk web server log, in order to find exact reason why Plesk do not work properly:

  1. Login to the server console and start tailing Plesk server log:

    tail -fn0 /var/log/sw-cp-server/error_log
    
  2. Reproduce the issue: try to login to Plesk or to perform operation which fails.

  3. Use the error from the output and try to find a solution in our knowledgebase. The most popular issues are described below as well.

Issues with Plesk showing "500 - Internal Server Error" error

  • #9755 Enabling the Linux kernel parameter kernel.yama.ptrace_scope prevents access to the license management page.

  • #118383 Could not run Plesk CLI: "symbol lookup error: /usr/bin/sw-engine: undefined symbol"

    The following error appears when attempting to run any Plesk CLI:

    /usr/bin/sw-engine: symbol lookup error: /usr/bin/sw-engine: undefined symbol: _ZNK3APS4Meta10ScriptInfo13isPriveledgedEv
    

Windows:

General troubleshoting steps

The reason of 500 error can be found in Windows event viewer.

  1. Login to the server via RDP

  2. Check Plesk error log:

    %plesk_dir%\admin\logs\php_error.log
    
  3. Press "Win+R" and type "eventvwr" command to open Evenr Viewer:

    • Check "Plesk" log under "Application and Services logs"
    • Check "Application" log under "Windows" logs

Issues with Plesk showing "500 - Internal Server Error" error

  • #122024 Plesk Panel shows HTTP Error 500.0 Internal Server Error

    Plesk panel interface displays the below error:

    HTTP Error 500.0 - Internal Server Error
    <handler> scriptProcessor could not be found in <fastCGI> application configuration
    
  • 121733 php-cgi.exe process exited unexpectedly

    The website is displaying an "Internal error":

    HTTP Error 500.0 - Internal Server Error
    C:\Program Files (x86)\Parallels\Plesk\Additional\PleskPHP53\php-cgi.exe - The FastCGI process exited unexpectedly
    

Search words:

500 error

500 Internal Server Error

httpd dead but pid file exists

mod_fcgid: can't lock process table in PM




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