Title: Uncaught Error: Call to undefined function /ServerHelper.php:72
Last modified: September 12, 2024

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# Uncaught Error: Call to undefined function /ServerHelper.php:72

 *  Resolved [Marty](https://wordpress.org/support/users/bozzmedia/)
 * (@bozzmedia)
 * [1 year, 8 months ago](https://wordpress.org/support/topic/uncaught-error-call-to-undefined-function-serverhelper-php72/)
 * Receiving 500 errors upon running a package, php error log reports:
 *     ```
       [12-Sep-2024 22:03:36 UTC] PHP Fatal error:  Uncaught Error: Call to undefined function NJT\FastDup\Admin\Helper\disk_free_space() in /var/www/redacted.com/htdocs/wp-content/plugins/fastdup/includes/Admin/Helper/ServerHelper.php:72
       Stack trace:
       #0 /var/www/redacted.com/htdocs/wp-content/plugins/fastdup/includes/Admin/Package.php(381): NJT\FastDup\Admin\Helper\ServerHelper::system_scan()
       #1 /var/www/redacted.com/htdocs/wp-content/plugins/fastdup/includes/Endpoint/PackageApi.php(128): NJT\FastDup\Admin\Package::run_scanner()
       #2 /var/www/redacted.com/htdocs/wp-includes/rest-api/class-wp-rest-server.php(1230): NJT\FastDup\Endpoint\PackageApi->scan_package()
       #3 /var/www/redacted.com/htdocs/wp-includes/rest-api/class-wp-rest-server.php(1063): WP_REST_Server->respond_to_request()
       #4 /var/www/redacted.com/htdocs/wp-includes/rest-api/class-wp-rest-server.php(439): WP_REST_Server->dispatch()
       #5 /var/www/redacted.com/htdocs/wp-includes/rest-api.php(420): WP_REST_Server->serve_request()
       #6 /var/www/redacted.com/htdocs/wp-includes/class-wp-hook.php(324): rest_api_loaded()
       #7 /var/www/redacted.com/htdocs/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters()
       #8 /var/www/redacted.com/htdocs/wp-includes/plugin.php(565): WP_Hook->do_action()
       #9 /var/www/redacted.com/htdocs/wp-includes/class-wp.php(418): do_action_ref_array()
       #10 /var/www/redacted.com/htdocs/wp-includes/class-wp.php(813): WP->parse_request()
       #11 /var/www/redacted.com/htdocs/wp-includes/functions.php(1336): WP->main()
       #12 /var/www/redacted.com/htdocs/wp-blog-header.php(16): wp()
       #13 /var/www/redacted.com/htdocs/index.php(17): require('...')
       #14 {main}
         thrown in /var/www/redacted.com/htdocs/wp-content/plugins/fastdup/includes/Admin/Helper/ServerHelper.php on line 72
       ```
   
 * Response in browser console:
    `SyntaxError: JSON.parse: unexpected character 
   at line 1 column 1 of the JSON data`
 * Any thoughts? Thanks!

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Support [Bruce](https://wordpress.org/support/users/ninjateamwp/)
 * (@ninjateamwp)
 * [1 year, 8 months ago](https://wordpress.org/support/topic/uncaught-error-call-to-undefined-function-serverhelper-php72/#post-18011712)
 * Hi [@bozzmedia](https://wordpress.org/support/users/bozzmedia/) ,
 * Thanks for coming here today.
 * Please let me consult our dev unit about it, I will get back to you as soon as
   possible.
 * Regards,
   Bruce
 *  Plugin Support [mialewp](https://wordpress.org/support/users/mialewp/)
 * (@mialewp)
 * [1 year, 8 months ago](https://wordpress.org/support/topic/uncaught-error-call-to-undefined-function-serverhelper-php72/#post-18011901)
 * Hello [@bozzmedia](https://wordpress.org/support/users/bozzmedia/),
   Greetings
   of the day. Thanks for your patience and efforts. Please check your server, maybe
   the disk_free_space is disabled. In that case, please enable it and test again.
   Hope that helps.Many thanks!Mia

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘Uncaught Error: Call to undefined function /ServerHelper.php:72’ is closed
to new replies.

 * ![](https://ps.w.org/fastdup/assets/icon-256x256.png?rev=2549527)
 * [FastDup - Fastest WordPress Migration & Duplicator](https://wordpress.org/plugins/fastdup/)
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 * 2 replies
 * 3 participants
 * Last reply from: [mialewp](https://wordpress.org/support/users/mialewp/)
 * Last activity: [1 year, 8 months ago](https://wordpress.org/support/topic/uncaught-error-call-to-undefined-function-serverhelper-php72/#post-18011901)
 * Status: resolved