Can't access Samba shares


I’m running Openhabian 2.3.0-1 on my Raspberry 3.
There are two Windows machines which I use, out of which one can access samba shares and the other one can’t. (openHAB-conf; openHAB-share)
Working PC: Windows 10.0.17134 Build 17134, Workgroup, can see shares, can access.
Problematic PC: Windows 10.0.17763 Build 17763, Workgroup, can see shares, can’t access. Error code 0x80070035. No errors in log files. ( SMB 1.0 is enabled manually as later windows versions have dropped the support by default).

So smb.conf should be OK as one PC can access shares.
Couple of months ago the problematic PC worked fine with Openhabian shares. I had to make clean install for Openhab and maybe Windows upgraded itself as well meanwhile.

Any ideas what could be the issue? Grateful for any help.

Your problem seems not to be openHAB related, please use a search engine and look for 0x80070035 error code. Plenty of hits …

It wasn’t a firewall issue.
SMB1.0 guest access policy was not activated.