Article ID: 114882, created on Oct 3, 2012, last review on Jun 16, 2016

  • Applies to:
  • Plesk

Table of contents

Linux:

Plesk is showing "500 - Internal Server Error" error

General troubleshooting steps

The reason of 500 error can be found in Plesk web server log, in order to find exact reason why Plesk does 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.

Known issues

  • #122201 500 - Internal Server Error, /sbin/sysctl: Too many open files in system.

  • #127828 500 - Internal Server Error, script '/var/www/vhosts/default/htdocs/wp-cron.php' not found or unable to stat.

  • #111684 500 - Internal Server Error, Repository is not opened.

  • #118383 500 - Internal Server Error, symbol lookup error: /usr/bin/sw-engine: undefined symbol.

  • #126226 500 - Internal Server Error, [ERROR]: spawning fcgi failed..

Websites are showing "500 - Internal Server Error" error

General troubleshooting steps

The reason of 500 error can be found in website log, in order to find exact reason why website does not work properly:

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

    # tail -fn0 /var/www/vhosts/system/example.com/logs/error_log
    
  2. Reproduce the issue: try to access website 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.

Known issues

  • #121251 500 - Internal Server Error, mod_fcgid: read data timeout.

  • #124935 500 - Internal Server Error, RewriteRule: bad flag delimiters.

  • #120785 500 - Internal Server Error, Premature end of script headers.

  • #127268 500 - Internal Server Error, (104)Connection reset by peer: mod_fcgid: error reading data from FastCGI server.

  • #121491 500 - Internal Server Error, mod_fcgid: can't apply process slot for /var/www/cgi-bin/cgi_wrapper/cgi_wrapper.

  • #124552 500 - Internal Server Error, Cannot allocate memory: mod_fcgid: can't run /var/www/cgi-bin/cgi_wrapper/cgi_wrapper.

  • #120381 500 - Internal Server Error, failed to load external entity "/etc/php-fpm.conf.

  • #125072 500 - Internal Server Error, failed to open log file /var/log/httpd/suexec_log.

  • #119314 500 - Internal Server Error, server reached MaxClients setting.

Windows:

Plesk is showing "500 - Internal Server Error" error

General troubleshooting 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 Event Viewer:

    • Check Plesk log under Application and Services logs
    • Check Application log under Windows logs
  4. Try to access Plesk locally via Windows Internet Explorer.

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

Known issues

  • #120959 500 - Internal Server Error, Fatal error 401: Mobile Connector initialization failed.

  • #127902 500.19 - Internal Server Error, Error Code 0x80070005.

  • #116964 500 - Internal Server Error, Error Code 0xfffffffe.

  • #123742 500 - Internal Server Error, An unknown FastCGI error occured.

  • #120044 500.21 - Internal Server Error, Handler "PleskEngine-FastCGI-php" has a bad module "FastCgiModule" in its module list.

  • #122024 500 - Internal Server Error, <handler> scriptProcessor could not be found in <fastCGI> application configuration.

  • #127748 500 - Internal Server Error, Error Code 0x0000000.

  • #114917 500 - Internal Server Error, ISAPI '%plesk_dir%\admin\bin\php5isapi.dll' reported itself as unhealthy. No reason was given by the ISAPI..

  • #127590 500 - Internal Server Error, Exception: Package with UID '' not found.

  • #127138 500 - Internal Server Error, Error Code 0x8007007e.

  • #116966 500 - Internal Server Error, Unable to execute proc_open: The system can not find the file specified.

  • #126001 500 - Internal Server Error, C:\Program Files (x86)\Parallels\Plesk\admin\bin\php-cgi.exe - The FastCGI process exited unexpectedly

  • #121200 500 - Internal Server Error, Error Code 0xc0000005.

  • #120419 500.19 - Internal Server Error, Configuration file is not well-formed XML.

  • #128822 500 - Internal Server Error, The ionCube Loader is a Zend-Engine extension and not a module.

Websites are showing "500 - Internal Server Error" error

General troubleshooting steps

The reason of 500 error can be found in Windows Event Viewer.

  1. Login to the server via RDP

  2. Press Win+R and type eventvwr command to open Event Viewer:

    • Check Application log under Windows logs
  3. Try to access website locally via Windows Internet Explorer.

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

Known issues

  • #127902 500.19 - Internal Server Error, Error Code 0x80070005.

  • #127656 500 - Internal Server Error, Error Code 0x800700b7.

  • #119823 500 - Internal Server Error on classic ASP page.

  • #128998 Website is continuously loading and then fails: 500 - Internal Server Error

  • #121784 500 - Internal Server Error, php-cgi.exe - The FastCGI process exited unexpectedly.

  • #121733 500 - Internal Server Error, Unable to load dynamic library.

  • #120616 500 - Internal Server Error, Error Code 0x800700c1.

  • #111908 500 - Internal Server Error, Failed to run command 'cmd /C ""C:\Program Files (x86)\Parallels\Plesk\bin\ipmanage.exe" --xml-info"' Exit code: 1.

  • #125106 500 - Internal Server Error, Could not create a Disk Cache Sub-directory for the Application Pool.

  • #123076 500.24 - Internal Server Error, An ASP.NET setting has been detected that does not apply in Integrated managed pipeline mode.

  • #124638 500 - Internal Server Error, The FastCGI process exceeded configured activity timeout.

  • #123175 500 - Internal Server Error, Calling LoadLibraryEx on ISAPI filter "C:\Program Files (x86)\Parallels\Plesk\isapi\urlprotect.dll" failed.

Related HUBs

  • #124377 [HUB] 502 - Bad Gateway Error

  • #126564 [HUB] Unable to login to Plesk

Search Words

500 error

500 Internal Server Error

500 - Internal Server Error

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