Disable SMB1 (if you haven't already). I don't know what a Raven Document Scanner is, but I suspect it's a device attached via ethernet cable, or a device attached via USB to a device attached via an ethernet cable. If it's WIFI, you might just ignore me...
How are you accessing UnRAID for management? I'm guessing WebUI, but that could be "local" (ip address) or through "MyServers" plugin? Windoze or Mak (or Linux) or directly plugged in monitor and keyboard?
UnRaid is tightening security, as it should, and 6.10 to 6.11 is quite a leap.
I'm sorry I don't have the answer yet...
That is the most true error I've seen in a long, long time.
MrGrey.