Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\Apache24\htdocs\anteriores\apifac\vendor\tijsverkoyen\css-to-inline-styles\tests\CssToInlineStylesTest.php:9 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\anteriores\apifac\vendor\tijsverkoyen\css-to-inline-styles\tests\CssToInlineStylesTest.php on line 9