Fatal error: Uncaught Error: Call to a member function loadFromExtension() on null in /home/cthadmin/public_html/vendor/symfony/framework-bundle/Tests/DependencyInjection/Fixtures/php/serializer_mapping.php:3
Stack trace:
#0 {main}
thrown in /home/cthadmin/public_html/vendor/symfony/framework-bundle/Tests/DependencyInjection/Fixtures/php/serializer_mapping.php on line 3