if you are talking about SMB share access it is simple it is inaccessible from a client.
From the error message it is not clear on how to fix it besides just start over.
As mentioned I used it for a few years until it decided it was out of evaluation period.
I have 2 NAS shares and one iSCSI share the iSCSI still works, it is the NAS SMB share that is being blocked.

So if you could give a link whit specifics what it will cover that would be nice.
The comparison between free and full product seems to not apply.