My Vero4k was running just fine and connected to my QNAP NAS (TS451) SMB shares without problems. Since a few weeks, I have the problem, that I no longer can connect to my SMB shares on the QNAP (can connect from my PC or MAC without problems).
In the Syslog on QNAP, I don’t see an error, in the KODI logs, I see errors like:
2019-10-19 00:26:09.948 T:3941245664 WARNING: Process directory ‘smb://192.168.1.3/movies/’ does not exist - skipping scan.
2019-10-19 00:26:10.284 T:3941245664 WARNING: Process directory ‘smb://homeserver/movies/’ does not exist - skipping scan.
2019-10-20 22:59:54.377 T:3558806240 ERROR: SMBDirectory->GetDirectory: Unable to open directory : ‘smb://192.168.1.3/movies’
unix_err:‘11’ error : ‘File exists’
Well you could play around with the Samba versions on Kodi (Settings - Services - SMB Client - Max Protocol)
Also gerneally it is suggested to use IP addresses instead of Server Names for the shares as that work more reliable.
Lastly if it is a long term setup I suggest to switch from Kodi based SMB access to kernel based mounts (e.g. autofs).
When this happens it is normally a permission issue on the NAS. I would double check that you have allowed guest access to everyone on the shares. If you are using logins that would need to add those to your sources or a passwords.xml file.