Weird error from Mac on connecting to Samba: The folder "blah" can't be opened because shutup

[Richard Sharpe]

Hi folks,

I am getting the following error when connecting to a share on a Samba
4.7.1 system (without the Mac Spotlight VFS etc):

'The folder "blah" can't be opened because you don't have permissions
to see it's contents."

However, there are no SMB requests showing ACCESS DENIED.

I do see a lot of attempts to open files like ._? and .Spotlight-V100
and so forth, none of which exist, and I see an FSCTL to
SRV_REQUEST_RESUME_KEY which returns an internal error.

Can anyone say what is going on and how to prevent such errors?

-- 
Regards,
Richard Sharpe
(何以解憂？唯有杜康。--曹操)(传说杜康是酒的发明者)