Skip to content
  • Solutions
    By Role
    • For Developers
    • For Content Managers
    • For Agencies
    • For IT Admins
    • For Web Hosters
    • For Developers
    • For Content Managers
    • For Agencies
    • For IT Admins
    • For Web Hosters
    By Infrastructure
    • Overview
    • AWS
    • Microsoft Azure
    • Alibaba Cloud
    • Google Cloud Platform
    • Vultr
    • Overview
    • AWS
    • Microsoft Azure
    • Alibaba Cloud
    • Google Cloud Platform
    • Vultr
    • Digital Ocean
    • Linode
    • Upcloud
    • Oracle
    • OVH
    • Digital Ocean
    • Linode
    • Upcloud
    • Oracle
    • OVH
  • Product
    • Plesk Features
    • Plesk Editions
    • What’s new
    • Pricing
    • Roadmap
    • Lifecycle Policy
    • Extensions Catalogue
  • Pricing
  • Extensions
    Featured Extensions
    • SocialBee
    • WP Toolkit
    • Sitejet Builder for Plesk
    • SEO Toolkit
    • Joomla! Toolkit
    • Premium Email
    • Email Security
    • SocialBee
    • WP Toolkit
    • Sitejet Builder for Plesk
    • SEO Toolkit
    • Joomla! Toolkit
    • Premium Email
    • Email Security
    Bundles and packs:
    • Business and Collaboration Edition
    • WP pack
    • Hosting pack
    • Power pack
    • Language pack
    • Business and Collaboration Edition
    • WP pack
    • Hosting pack
    • Power pack
    • Language pack

    See all Extensions

  • For Partners
    • Plesk Contributor Program
    • Plesk Partner Program
    • Affiliate program
    • Plesk University
  • Help Center
    • Documentation
    • Professional Services
    • Support
    • Contact Us
    • Wiki
    • Forum
  • Plesk 360 login
  • Free Trial
  • Pricing
  • Solutions
    • By Role
      • For Developers
      • For Content Managers
      • For Agencies
      • For IT Admins
      • For Web Hosters
    • By Infrastructure
      • Overview
      • Plesk on Amazon Web Services (AWS & Lightsail)
      • Microsoft Azure
      • Alibaba Cloud
      • Google Cloud Platform
      • Vultr
      • DigitalOcean
      • Linode
      • UpCloud
      • Oracle
      • OVH
  • Products
  • Pricing
  • Extensions
    • Featured Extensions
      • SocialBee
      • WP Toolkit
      • Sitejet Builder for Plesk
      • SEO Toolkit
      • Joomla! Toolkit
      • Premium Email
      • Email Security
    • Bundles and packs:
      • Business and Collaboration Edition
      • WP pack
      • Hosting pack
      • Power pack
      • Language pack
      • See all Extensions
  • For Partners
    • Plesk Contributor Program
    • Plesk Partner Program
    • Affiliate Program
    • Plesk University
  • Help Center
    • Documentation
    • Professional Services
    • Support
    • Contact Us
    • Wiki
    • Forum
  • Plesk 360 login
  • Free Trial
  • Pricing
  • Solutions
    • By Role
      • For Developers
      • For Content Managers
      • For Agencies
      • For IT Admins
      • For Web Hosters
    • By Infrastructure
      • Overview
      • Plesk on Amazon Web Services (AWS & Lightsail)
      • Microsoft Azure
      • Alibaba Cloud
      • Google Cloud Platform
      • Vultr
      • DigitalOcean
      • Linode
      • UpCloud
      • Oracle
      • OVH
  • Products
  • Pricing
  • Extensions
    • Featured Extensions
      • SocialBee
      • WP Toolkit
      • Sitejet Builder for Plesk
      • SEO Toolkit
      • Joomla! Toolkit
      • Premium Email
      • Email Security
    • Bundles and packs:
      • Business and Collaboration Edition
      • WP pack
      • Hosting pack
      • Power pack
      • Language pack
      • See all Extensions
  • For Partners
    • Plesk Contributor Program
    • Plesk Partner Program
    • Affiliate Program
    • Plesk University
  • Help Center
    • Documentation
    • Professional Services
    • Support
    • Contact Us
    • Wiki
    • Forum
  • Plesk 360 login
  • Free Trial
Plesk 360 login
Free Trial

Knowledge Base

Unable to install plugin in WordPress: HTTP Error 500.0 – Internal Server Error

 
applications extensionsdeveloperdomainsfastcgigo

Symptoms

Unable to install plugin in WordPress (for example, WooCommerce or Yoast SEO ) with one of the following errors:

Installation failed: Could not copy file. woocommerce/dummy-data/dummy-variations.csv

Installation failed: external Server Error

Installation failed: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
IIS 8.5 Detailed Error - 500.0 - Internal Server Error
...
--> HTTP Error 500.0 - Internal Server Error C:Program Files (x86)ParallelsPleskAdditionalPleskPHP54php-cgi.exe - The FastCGI process exceeded configured request timeout Most likely causes:
IIS received the request; however, an internal error occurred during the processing of the request.
...

Installation failed: 500 external Server Error <!--[if lte IE 6]><![endif]--> Internal Server Error The server encountered an internal error or misconfiguration and was unable to complete your request. Please contact the server administrator to inform of the time the error occurred and of anything you might have done that may have caused the error. More information about this error may be available in the server error log.

Cause

PHP requirements for the WordPress plugin are not met.

Resolution

Tune PHP settings for a domain according to the WordPress plugin requirements:

  1. Log in to Plesk GUI

  2. Go to Domains > example.com > PHP Settings

  3. Enable custom FastCGI settings

  4. Increase activityTimeout according to the plugin requirements, for example, to 120 and apply changes.

    Note: Another limit may need to be adjusted: requestTimeout. The default value for activityTimeout is 70. The default value for requestTimeout is 90. These are taken from IIS default values. To learn more about those limits, click here.

  5. If the issue is still reproduced, increase the values from the previous step.

  6. In case values were adjusted to a reasonable value but the issue persists, consider one of the following options:

    • Change PHP version
    • Contact WordPress plugin developer and customize PHP settings according to WordPress plugin requirements
    • Disable WordPress plugin
Tweet
Share
Share
Email
0 Shares
Read the full article
Related Posts

How to Host a Go App on Plesk

Read More »

PHP-FPM: The Future of PHP Handling

Read More »

Exploring Plesk’s Added Value Solutions So Far in 2023

Read More »
Knowledge Base

Website hosted in Plesk for Windows fails to load: The FastCGI process exceeded configured activity timeout

Read More »

WordPress instance in Plesk is marked as broken: Warning: require_once(): open_basedir restriction in effect

Read More »

WordPress websites on a Plesk server show “404 Not Found” when PHP-FPM by Nginx and Proxy Mode are used

Read More »

Operation in Plesk fail with “Error: no secure shell available”: chroot: failed to run command ‘/bin/bash’: Permission denied

Read More »

Hosting Wiki

  • Django
  • Server Redundancy
  • Google Cloud CDN
  • AMP
  • CGI
  • Bare Metal Server
  • PhpMyAdmin
  • phpPgAdmin
  • Oracle VM Server
  • Server Virtualization Software
  • Windows Server
  • PHP
  • MongoDB
  • HTTP/3
  • HTTP/2
  • Domain
  • WordPress
  • Plesk
  • Lighttpd
  • Web Server
  • DNS Server
  • HTTP
X-twitter Linkedin Youtube Reddit Github
  • Product
  • Login
  • Pricing
  • Editions
  • For Partners
  • Partner Program
  • Contributor Program
  • Affiliate Program
  • Plesk University
  • Company
  • Blog
  • Careers
  • Events
  • About Plesk
  • Our Brand
  • Resources
  • User and Admin guides
  • Help Center
  • Migrate to Plesk
  • Contact Us
  • Hosting Wiki
  • Forum
  • Legal
  • Legal
  • Privacy Policy
  • Imprint

© 2025 WebPros International GmbH

Part of the WebPros®  Family