Fatal Error when updating

  • Resolved Bardin

    (@bardinellis)


    4 months, 1 week ago

    Hi,

    There seems to be an error when updating to the latest version of the ACF plugin (6.4.3).

    The website is hosted on Kinsta. We have tried both free and paid versions of the plugin, but both give the same error.

    Any help appreciated. Thank you

    Fatal error: Uncaught Error: Call to undefined method Composer\Autoload\ClassLoader::setClassMapAuthoritative() in /www/public/wp-content/plugins/advanced-custom-fields/vendor/composer/autoload_real.php:32 Stack trace: #0 /www/public/wp-content/plugins/advanced-custom-fields/vendor/autoload.php(22): ComposerAutoloaderInit94e23cbc47a4750e27ee21b7644f1866::getLoader() #1 /www/public/wp-content/plugins/advanced-custom-fields/acf.php(136): include_once('/www/_...') #2 /www/public/wp-content/plugins/advanced-custom-fields/acf.php(853): ACF->initialize() #3 /www/public/wp-content/plugins/advanced-custom-fields/acf.php(859): acf() #4 /www/public/wp-admin/includes/plugin.php(2387): include_once('/www/_...') #5 /www/public/wp-admin/plugins.php(194): plugin_sandbox_scrape('advanced-custom...') #6 {main} thrown in /public/wp-content/plugins/advanced-custom-fields/vendor/composer/autoload_real.php on line 32
Viewing 2 replies - 1 through 2 (of 2 total)
  • Plugin Support ACF Support

    (@acfsupport)

    4 months ago

    Hi @bardinellis,

    Thank you for reaching out for assistance and for providing the detailed error log.

    It sounds like you’re encountering a PHP dependency conflict. The error message you’ve shared indicates that another plugin or your theme is loading an older version of the Composer autoloader library, which then conflicts with the version ACF requires, causing the fatal error.

    Please can you create a ticket using our ​support form and we can look into it further.

    Kind regards,

    Pat

    rainporch

    (@rainporch)

    3 months, 3 weeks ago

    What was the resolution for this issue? I’m having the same error with all plugins turned off and the default Twenty Twenty Five theme installed, so I don’t think it’s a plugin or theme conflict.

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

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