Ok, you could try to enable debug logging with enable component specific logging for SMBlibrary and then upload logs again so that we might see what the problem is.
Alternative I always can only recommend to move away from Kodi internal mounts to Kernel based mounts (fstab or autofs) as they always will be more reliable.
Those logs are not debug enabled (see below) and also the option of enabled component specific logging you should find after reading that.
Actually before you might also want to try to set Min/Max SMBprotocol to 3 in Settings - Services - SMB Client
To get a better understanding of the problem you are experiencing we need more information from you. The best way to get this information is for you to upload logs that demonstrate your problem. You can learn more about how to submit a useful support request here.
Depending on the used skin you have to set the settings-level to standard or higher, in summary:
enable debug logging at settings->system->logging
enable component-specific logging for all components
enable event logging and notification event logging
reboot the OSMC device twice(!)
reproduce the issue
upload the log set (all configs and logs!) either using the Log Uploader method within the My OSMC menu in the GUI or the ssh method invoking command grab-logs -A
publish the provided URL from the log set upload, here
Thanks for your understanding. We hope that we can help you get up and running again shortly.
Thanks I have selected Verbose logging for the SMB library, rebooted twice.
Tried to connect to Network Shares, one with ip address and one with the name as I previously had configured.
Went to MyOMSC and uploded the log
Well this is the same error message as @Rengoor got so I wonder why his solution isn’t working for you. SPNEGO login failed: The attempted logon is invalid. This is either due to a bad username or authentication information.
BTW, I didn’t saw any request attempt using an IP address.
I did try toconnect using an ip address and the user name and password of my pc has not changed, I have a Dune Prime 3.0 in another room which accesses the shares without any problem. Would you advise me going back to the previous build and trying from there, it did work on that before I updated.
i set Min SMB v1 and Max to SMB V3 was that incorrect, also how do I change to kernel based mounts (aufofs) as I have not seen that in the menus. We are having a severe thunderstorm at the moment so I am working between lightning events if my replies take some time.