Fatal error: Uncaught Error: Class "fs" not found in /volume1/web/packages/system/lib/class/user/user.php on line 3

Error: Class "fs" not found in /volume1/web/packages/system/lib/class/user/user.php on line 3

Call Stack:
    0.0002     359672   1. {main}() /volume1/web/packages/system/lib/class/user/user.php:0