Fatal Error – setClassMapAuthoritative

Hi David,

Another site, another error. Probably a conflict with another plugin, but we did a rollback to version 3.0.6, to get the site back online and I didn’t have the time yet to investigate the issue. Do you have any idea, what this could be? (PHP 7.1)

Fatal error: Uncaught Error: Call to undefined method Composer\Autoload\ClassLoader::setClassMapAuthoritative() in /********/wp-content/plugins/mollie-payments-for-woocommerce_/includes/mollie-api-php/vendor/composer/autoload_real.php:38 Stack trace: #0 /********/wp-content/plugins/mollie-payments-for-woocommerce_/includes/mollie-api-php/vendor/composer-autoload.php(7): ComposerAutoloaderInit4062f91c07f6f2ba911ecd0f0813a468::getLoader() #1 /********/wp-content/plugins/mollie-payments-for-woocommerce_/includes/mollie-api-php/vendor/autoload.php(5): require_once('********...') #2 /********/wp-content/plugins/mollie-payments-for-woocommerce_/mollie-payments-for-woocommerce.php(25): require_once('********...') #3 /********/wp-admin/includes/plugin.php(1897): include('******** in /********/wp-content/plugins/mollie-payments-for-woocommerce_/includes/mollie-api-php/vendor/composer/autoload_real.php on line 38