adjust the security policies on the Windows client.

Run > Secpol.msc

then I set Local Policies > Security Options > Network Security: LAN Manager authentication level to ‚Send NTLMv2 response only. Refuse LM & NTLM‘

Open the search tool from the right-hand side of the screen, and type „secpol.msc“ in the box, and then click OK.
Click Local Policies, Security Options , „Network Security: LAN Manager authentication level.“
Click „Send LM & NTLM – use NTLMv2 session security if negotiated.“
Click Apply.

Podrobný návod:
https://www.tannerwilliamson.com/windows-7-seven-network-file-sharing-fix-samba-smb-394/