Activation error

Fatal error: Uncaught Error: Call to undefined method Composer\Autoload\ClassLoader::setClassMapAuthoritative() in /var/www/vhosts/example_domain/httpdocs/wp-content/plugins/cf7-mollie/includes/libs/mollie-api-php/vendor/composer/autoload_real.php:38 Stack trace: #0 /var/www/vhosts/example_domain/httpdocs/wp-content/plugins/cf7-mollie/includes/libs/mollie-api-php/vendor/composer-autoload.php(7): ComposerAutoloaderInit7e0152c7dcae3a983f6f7ad11b55b550::getLoader() #1 /var/www/vhosts/example_domain/httpdocs/wp-content/plugins/cf7-mollie/includes/libs/mollie-api-php/vendor/autoload.php(5): require_once(‘/var/www/vhosts…’) #2 /var/www/vhosts/example_domain/httpdocs/wp-content/plugins/cf7-mollie/includes/php/initialize.php(9): require_once(‘/var/www/vhosts…’) #3 /var/www/vhosts/example_domain/httpdocs/wp-content/plugins/cf7-mollie/includes/php/webhook.php(2): require_once(‘/var/www/vhosts…’) #4 /var/www/vhosts/example_domain/httpdocs/wp-content/plugins/cf7-mollie/includes/php/amount.php(2): require in /var/www/vhosts/example_domain/httpdocs/wp-content/plugins/cf7-mollie/includes/libs/mollie-api-php/vendor/composer/autoload_real.php on line 38