No access to NAS, ever

[mtv]

you could try follow this guide.

Mounting network shares with autofs (alternative to fstab)

This how-to describes how to mount your network shares via autofs. Autofs should be as performant as fstab based mounting but has the advantage that your shares are mounted on demand which also should give you more reliability in case of network interuptions. First install the autofs package sudo apt-get install autofs If you already have mounted your shares already via fstab comment out that line in fstab and reboot. For this how-to we are going to use a directory for each server, if you wa…

works both for Samba or NFS.

there are also reports about passwords file:

ther might be old information in your passwords.xml

SPNEGO login failed: The attempted logon is invalid. This is either due to a bad username or authentication information.

You could try rm /home/osmc/.kodi/userdata/passwords.xml and then try to connect again but be carefull if you use this file and info in ot also for other area’s.

Check as well the SMB version on NAS and Vero, the need to be the same. SMB V1 is not secure anymore.