Fatal error: Uncaught Error: Class "fs" not found in /volume1/web/packages/tools/sync/sync.legacy/index.php on line 15

Error: Class "fs" not found in /volume1/web/packages/tools/sync/sync.legacy/index.php on line 15

Call Stack:
    0.0001     359664   1. {main}() /volume1/web/packages/tools/sync/sync.legacy/index.php:0