Erreur

Erreur de lecture de la base de données
Debug info: MySQL server has gone away
SELECT * FROM mdl_context WHERE contextlevel = ?
[array (
0 => 10,
)]
Error code: dmlreadexception
Stack trace:
  • line 486 of /lib/dml/moodle_database.php: dml_read_exception thrown
  • line 1273 of /lib/dml/mysqli_native_moodle_database.php: call to moodle_database->query_end()
  • line 1671 of /lib/dml/moodle_database.php: call to mysqli_native_moodle_database->get_records_sql()
  • line 1643 of /lib/dml/moodle_database.php: call to moodle_database->get_record_sql()
  • line 1622 of /lib/dml/moodle_database.php: call to moodle_database->get_record_select()
  • line 6308 of /lib/accesslib.php: call to moodle_database->get_record()
  • line 758 of /lib/setup.php: call to context_system::instance()
  • line 35 of /config.php: call to require_once()
  • line 26 of /course/index.php: call to require_once()