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[HUB] 500 - Internal Server Error

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

  • Parallels Plesk

Table of contents


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


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:

  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

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