[succo]

Are you sure this issue started with #1028?

well, i tried the latest version before the stop and it worked, and it didn't when i tried the version from 30-10

CIFS? Is that the hostname of your LibreELEC/Kodi client?

no, that's the protocol used to connect

Can you also confirm once more that your Samba server version is actually 3.6.12, as those log messages don't match the Samba source code (if you hand-typed the log, it could be typos, I guess). Unfortunately as the server log messages do not relate to any available Samba source code I'm a little dubious about your server - you could try increasing the server logging level (log level = 10 in smb.conf) and upload the log to somewhere.

Other than that, I'm really not sure what else to suggest, as I know for sure that a Samba 3.6.12 server can work with a Samba 4.11.x client, when configured correctly. 

well, i'm sure smbd outputs 3.6.12 when run with --version, and that's what is in the logs. Tomorrow will try with loglevel 10 and will let you know
btw, thanks for the help and troubleshooting