Fatal error: Uncaught Error: Class "Drupal\KernelTests\KernelTestBase" not found in /home/fnbrshareacopy/public_html/modules/contrib/typed_data/tests/src/Kernel/PlaceholderResolverTest.php:24 Stack trace: #0 {main} thrown in /home/fnbrshareacopy/public_html/modules/contrib/typed_data/tests/src/Kernel/PlaceholderResolverTest.php on line 24