Fatal error: Uncaught Error: Class "qbank_columnsortorder\tests\external_function_testcase" not found in C:\Apache24\htdocs\moodle\question\bank\columnsortorder\tests\external\set_hidden_columns_test.php:34 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\moodle\question\bank\columnsortorder\tests\external\set_hidden_columns_test.php on line 34