Fatal error: Uncaught Error: Class "Drupal\Tests\collapsiblock\Functional\CollapsiblockFunctionalTestBase" not found in /home/fnbrshareacopy/public_html/modules/contrib/collapsiblock/tests/src/Functional/BlockInstanceTest.php:10 Stack trace: #0 {main} thrown in /home/fnbrshareacopy/public_html/modules/contrib/collapsiblock/tests/src/Functional/BlockInstanceTest.php on line 10