Fatal error: Uncaught Error: Trait "SebastianBergmann\CodeCoverage\Util\EnsuresUtf8" not found in C:\wamp64\houda\vendor\phpunit\php-code-coverage\src\Report\Xml\Unit.php:20 Stack trace: #0 {main} thrown in C:\wamp64\houda\vendor\phpunit\php-code-coverage\src\Report\Xml\Unit.php on line 20