RemoveAll returns "open <path/to/folder>: invalid response error: signing required

[inzanez]

Hi

just seen that when trying to use RemoveAll on a Windows 2012 Server shared drive I get the error returned:
open shared\test: invalid response error: signing required

It then continues some levels up (not all):
open shared\test\a: invalid response error: signing required
open shared\test\b: invalid response error: signing required

Not sure what triggers the issue, the files are not being used by any other application.