This happened on both OMV3 and OMV4 (switched to 4 after 3 seemingly did not work).
I did a fresh install of OMV, followed this guide to set-up things: [HOW-TO] Browse / Connect to OMV SMB shares with Windows 10
And then took the following steps:
Go to Shared Folders to create 2 folders.
Go to Access Right Management and created a single user that belongs to the "users" and "sambashare" groups.
Go to Privileges to give the new user R/W access to the 2 Shared Folders.
Go to SMB/CIFS -> Shares to add the 2 shares
Access the share from my Windows 10 notebook
I fill in the samba user credentials
At this point it looks good and the shares are visible but if I try to click on them I get this:
I followed these steps 3 times; 2x with OMV3 and 1x with OMV4 and exactly the same happens.
OMV is being installed on an ESXi host and I delete the VM for every new attempt.
Am I missing something?
//edit Tried using SMB3 instead of SMB2, same results.
Also tried forcing guest only to see if it was the user, did not work either.
Lastly watched that full install video guide and just tried setting the same user groups as in the video (ssh/sudo/user), did not work either.