Hello, It looks like the changes for https://bugzilla.samba.org/show_bug.cgi?id=13328 broke your setup.
But the following log: Failed to fetch domain sid for LAN (which causes "NT_STATUS_INVALID_PARAMETER_MIX" later). Do you have this same error with samba 4.7? Second guess: Is your server memory low? Regards Mathieu Parent
