VBoxManage.exe guestcontrol: cannot perform any file system operation (like mkdir, copyto)

[StefanRoe]

I cannot perform any file system operation with my vm running win10/64 as guest.

How to Reproduce

VBoxManage.exe guestcontrol Win10forDCTest1 copyto --recursive --verbose --username test --password test --target-directory "C:/Users/test/test/" "a.txt"

produces:

Creating guest session as user 'test'...
Waiting for guest session to start...
Successfully started guest session (ID 1)
Copying from host to guest ...
VBoxManage.exe: error: Querying directory existence "C:/Users/test/test/" failed: VERR_NOT_FOUND.
Closing guest session ...

The same happens with mkdir and others.

The directory "C:/Users/test/test/" exists on the guest system, user and pw do so, too. User "test" has admin privileges, User access control is set to the lowest level.

[StefanRoe]

Please close this ticket, I missed the final installation of the extension pack.