ERROR_CLOUD_FILE_NOT_UNDER_SYNC_ROOT 0x80070186

Error code 390 · HRESULT 0x80070186

WINDOWS

The operation is only supported on files under a cloud sync root.

Windows troubleshooting diagram: Device Manager warning and a system file scan
Windows errors: check drivers, system files and Event Viewer, in that order.

What it means

ERROR_CLOUD_FILE_NOT_UNDER_SYNC_ROOT is a Windows error code (system error 390, returned as HRESULT 0x80070186) reported by Windows. Its official message is: “The operation is only supported on files under a cloud sync root.”

How to fix ERROR_CLOUD_FILE_NOT_UNDER_SYNC_ROOT

  1. Verify the path/file actually exists and is not blocked by antivirus quarantine
  2. Reinstall the application that raised the error to restore missing files
  3. Check the full path spelling (long paths >260 chars need a registry opt-in)

Related errors

ERROR_CLOUD_FILE_NOT_SUPPORTEDERROR_CLOUD_FILE_NOT_IN_SYNCERROR_CLOUD_FILE_IN_USEERROR_CLOUD_FILE_UNSUCCESSFULERROR_CLOUD_FILE_NETWORK_UNAVAILABLEERROR_CLOUD_FILE_PINNEDERROR_CLOUD_FILE_INSUFFICIENT_RESOURCES

Source: Microsoft WinError.h

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