I accidentally set ACL on share the way I wasn't able to fix it even I was Administrator (ie root) as had no access to the share (missing ACL). The only way was to remove /var/lib/samba/share_info.tdb and set all ALCs on all shares again (I try to remove/add the same share with no luck).
I'll be glad to have "samba-tool ntacl" to reset permission to the default I see when new share is created.
I see... Thank you :-)