I've marked this a duplicate of a samba bug 163042, which explains the reason why the files are inaccessible (the update contained a new bug), but the actual symptom (403 forbidden) seems to be discussed in bug 163116.
https://bugs.launchpad.net/ubuntu/+source/samba/+bug/163042 https://bugs.launchpad.net/ubuntu/+source/samba/+bug/163116
I've marked this a duplicate of a samba bug 163042, which explains the reason why
the files are inaccessible (the update contained a new bug), but the actual symptom
(403 forbidden) seems to be discussed in bug 163116.
https:/ /bugs.launchpad .net/ubuntu/ +source/ samba/+ bug/163042 /bugs.launchpad .net/ubuntu/ +source/ samba/+ bug/163116
https:/