Fatal error: Uncaught Error: Class "communication_matrix\matrix_client" not found in C:\Apache24\htdocs\moodle\communication\provider\matrix\tests\fixtures\mocked_matrix_client.php:29 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\moodle\communication\provider\matrix\tests\fixtures\mocked_matrix_client.php on line 29