Fatal error: Uncaught Error: Class 'React\Promise\TestCase' not found in /home/user1111058/www/dev.companysam.by/vendor/react/promise/tests/DeferredTest.php:7 Stack trace: #0 {main} thrown in /home/user1111058/www/dev.companysam.by/vendor/react/promise/tests/DeferredTest.php on line 7