Fatal error: Uncaught Error: Class 'Composer\DependencyResolver\Operation\SolverOperation' not found in /home/itscm/dev.its.cm/webservices/vendor/symfony/flex/src/InformationOperation.php:11 Stack trace: #0 {main} thrown in /home/itscm/dev.its.cm/webservices/vendor/symfony/flex/src/InformationOperation.php on line 11