$ sudo apt-get install libgnutls30 libgnutlsxx28
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
libgnutlsxx28 is already the newest version (3.7.3-4+b1).
Some packages could not be installed. This may mean that you have
requested an impossible...
This problem has been around me for quite a few months so I'm replying this post as it appeared the first in Google search.
The root problem is that the package pve-lxc (any version till now) depends on libgnutlsxx28 which has been apparently replaced by libgnutls30 in upstream debian. A number...