Title: PHP Fatal error after plugin activation
Last modified: March 25, 2021

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# PHP Fatal error after plugin activation

 *  Resolved [ulrichson](https://wordpress.org/support/users/ulrichson/)
 * (@ulrichson)
 * [5 years, 2 months ago](https://wordpress.org/support/topic/php-fatal-error-after-plugin-activation/)
 * After installing the plugin on a clean local WordPress installation following
   error is logged:
 * > PHP Fatal error: Uncaught Error: Call to undefined function is_plugin_active()
   > in /var/www/html/wp-content/plugins/live-preview-product-options-lite/main.
   > php:20\nStack trace:\n#0 /var/www/html/wp-settings.php(377): include_once()\
   > n#1 /var/www/html/wp-config.php(100): require_once(‘/var/www/html/w…’)\n#2 /
   > var/www/html/wp-load.php(37): require_once(‘/var/www/html/w…’)\n#3 /var/www/
   > html/wp-admin/admin.php(34): require_once(‘/var/www/html/w…’)\n#4 /var/www/
   > html/wp-admin/plugins.php(10): require_once(‘/var/www/html/w…’)\n#5 {main}\
   > n thrown in /var/www/html/wp-content/plugins/live-preview-product-options-lite/
   > main.php on line 20, referer: [http://localhost/wp-admin/plugin-install.php?s=+Live+Preview+-+Product+Options+-+Lite&tab=search&type=term](http://localhost/wp-admin/plugin-install.php?s=+Live+Preview+-+Product+Options+-+Lite&tab=search&type=term)
 * Wordpress: 5.5.3
    PHP: 7.4.12 WooCommerce: 5.1.0 Theme: Twenty Twenty
 * Is there a way to fix this?

Viewing 1 replies (of 1 total)

 *  Plugin Author [sahumedia](https://wordpress.org/support/users/sahumedia/)
 * (@sahumedia)
 * [4 years, 10 months ago](https://wordpress.org/support/topic/php-fatal-error-after-plugin-activation/#post-14771671)
 * Hey there we update soon as possible stay tuned pls

Viewing 1 replies (of 1 total)

The topic ‘PHP Fatal error after plugin activation’ is closed to new replies.

 * ![](https://ps.w.org/live-preview-product-options-lite/assets/icon-256x256.jpg?
   rev=2441460)
 * [Live Preview - Product Options - Lite](https://wordpress.org/plugins/live-preview-product-options-lite/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/live-preview-product-options-lite/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/live-preview-product-options-lite/)
 * [Active Topics](https://wordpress.org/support/plugin/live-preview-product-options-lite/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/live-preview-product-options-lite/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/live-preview-product-options-lite/reviews/)

 * 1 reply
 * 2 participants
 * Last reply from: [sahumedia](https://wordpress.org/support/users/sahumedia/)
 * Last activity: [4 years, 10 months ago](https://wordpress.org/support/topic/php-fatal-error-after-plugin-activation/#post-14771671)
 * Status: resolved