Fatal error: Uncaught Error: Class 'Symfony\Component\Config\Definition\Builder\NodeBuilder' not found in /home/slsparamedicalco/public_html/vendor/symfony/config/Tests/Fixtures/Builder/NodeBuilder.php:16 Stack trace: #0 /home/slsparamedicalco/public_html/vendor/symfony/config/Tests/Definition/Builder/TreeBuilderTest.php(17): require() #1 {main} thrown in /home/slsparamedicalco/public_html/vendor/symfony/config/Tests/Fixtures/Builder/NodeBuilder.php on line 16