Fatal error: Uncaught Error: Interface "Mustache_Source" not found in /srv/www/htdocs/moodle/lib/mustache/src/Mustache/Source/FilesystemSource.php:20 Stack trace: #0 {main} thrown in /srv/www/htdocs/moodle/lib/mustache/src/Mustache/Source/FilesystemSource.php on line 20