Comment 4 for bug 2003891

Well, this was a fun way to spend ~10 hours debugging something.

This worked for me, YMMV
apt-get install samba=2:4.11.6+dfsg-0ubuntu1 samba-common=2:4.11.6+dfsg-0ubuntu1 samba-common-bin=2:4.11.6+dfsg-0ubuntu1 libwbclient0=2:4.11.6+dfsg-0ubuntu1 samba-libs=2:4.11.6+dfsg-0ubuntu1 python3-samba=2:4.11.6+dfsg-0ubuntu1 samba-dsdb-modules=2:4.11.6+dfsg-0ubuntu1 samba-vfs-modules=2:4.11.6+dfsg-0ubuntu1 libldb2=2:2.0.8-2 python3-ldb=2:2.0.8-2 smbclient=2:4.11.6+dfsg-0ubuntu1 winbind=2:4.11.6+dfsg-0ubuntu1 libsmbclient=2:4.11.6+dfsg-0ubuntu1 libnss-winbind=2:4.11.6+dfsg-0ubuntu1 libpam-winbind=2:4.11.6+dfsg-0ubuntu1