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This thread is resolved. Here is a description of the problem and solution.


Fatal error: Uncaught Error: Call to undefined function simplexml_load_file()


check if simplexml extension is installed/activated on your server.

Relevant Documentation:

This topic contains 2 replies, has 2 voices.

Last updated by leec-6 4 months, 4 weeks ago.

Assigned support staff: Dennis.

Author Posts
May 20, 2019 at 1:37 am #3842845


If you enable WPML after it has been installed, WordPress Admin will be down.
The error appears in the browser as "HTTP 500".
Theme uses twenty nineteen.
No other plug-ins were installed.

Thanks very much for your help.

*Below is the debug content that appears in the browser after downloading.

Fatal error: Uncaught Error: Call to undefined function simplexml_load_file() in /home/2019newjklight/www/works/wp-content/plugins/sitepress-multilingual-cms/vendor/otgs/installer/includes/class-wp-installer.php:825 Stack trace: #0 /home/2019newjklight/www/works/wp-content/plugins/sitepress-multilingual-cms/vendor/otgs/installer/includes/class-wp-installer.php(72): WP_Installer->load_repositories_list() #1 /home/2019newjklight/www/works/wp-content/plugins/sitepress-multilingual-cms/vendor/otgs/installer/includes/class-wp-installer.php(47): WP_Installer->__construct() #2 /home/2019newjklight/www/works/wp-content/plugins/sitepress-multilingual-cms/vendor/otgs/installer/includes/functions-core.php(3): WP_Installer::instance() #3 /home/2019newjklight/www/works/wp-content/plugins/sitepress-multilingual-cms/vendor/otgs/installer/installer.php(15): WP_Installer() #4 /home/2019newjklight/www/works/wp-content/plugins/sitepress-multilingual-cms/vendor/otgs/installer/loader.php(121): include_once('/home/2019newjk...') #5 /home/2019n in /home/2019newjklight/www/works/wp-content/plugins/sitepress-multilingual-cms/vendor/otgs/installer/includes/class-wp-installer.php on line 825

May 20, 2019 at 9:42 am #3845677


Languages: English (English )

Timezone: Asia/Manila (GMT+08:00)


Welcome to WPML Support forum.

It seems that the simplexml extension is not installed in your server. Please review the following Errata Documentation:

Kind regards,

May 21, 2019 at 3:00 am #3851317


My issue is resolved now. Thank you!