Fatal error: Class 'Whoops\TestCase' not found in /var/www/html/dev/spa/vendor/filp/whoops/tests/Whoops/RunTest.php on line 16

Call Stack:
    0.0012     311632   1. {main}() /var/www/html/dev/spa/vendor/filp/whoops/tests/Whoops/RunTest.php:0