Warning: mysqli_connect(): (HY000/2002): No such file or directory in /volume1/web/games/classes/data.php on line 20

Fatal error: Uncaught Error: Call to a member function query() on bool in /volume1/web/games/classes/data.php:24
Stack trace:
#0 /volume1/web/games/classes/task.php(155): Data->getData('SELECT * FROM t...')
#1 /volume1/web/games/classes/task.php(129): Task->report(0)
#2 /volume1/web/games/tasks-switch.php(76): Task->prepareReport()
#3 /volume1/web/games/index.php(153): include('/volume1/web/ga...')
#4 {main}
  thrown in /volume1/web/games/classes/data.php on line 24