Fatal error: Uncaught Error: Class 'UnitTestCase' not found in /home/app/htdocs/lidia/vendor/cerdic/css-tidy/testing/unit-tests/class.csstidy_harness.php:6 Stack trace: #0 {main} thrown in /home/app/htdocs/lidia/vendor/cerdic/css-tidy/testing/unit-tests/class.csstidy_harness.php on line 6