Fatal error: Uncaught Error: Class "core\output\progress_trace" not found in /srv/www/htdocs/moodle/lib/classes/output/progress_trace/progress_trace_buffer.php:28 Stack trace: #0 {main} thrown in /srv/www/htdocs/moodle/lib/classes/output/progress_trace/progress_trace_buffer.php on line 28