Fatal error: Uncaught Error: Class "Mustache_Logger_AbstractLogger" not found in /srv/www/htdocs/moodle/lib/mustache/src/Mustache/Logger/StreamLogger.php:21 Stack trace: #0 {main} thrown in /srv/www/htdocs/moodle/lib/mustache/src/Mustache/Logger/StreamLogger.php on line 21