Fatal error: Uncaught Error: Class "Drupal\Tests\BrowserTestBase" not found in /home/yrdsb11w3creativ/public_html/108/To-Be-Copied/profiles/contrib/lightning/tests/src/Functional/SubprofileGeneratorTest.php:18 Stack trace: #0 {main} thrown in /home/yrdsb11w3creativ/public_html/108/To-Be-Copied/profiles/contrib/lightning/tests/src/Functional/SubprofileGeneratorTest.php on line 18