I am repeatedly getting this message:

Setting up apt-listchanges (3.10) ...
Traceback (most recent call last):
  File "/tmp/tmp.aulCeycFHm.aptlc/debconf-helper.py", line 6, in <module>
    import debconf
ImportError: No module named 'debconf'
dpkg: error processing package apt-listchanges (--configure):
 subprocess installed post-installation script returned error exit status 1
Processing triggers for man-db (2.7.6.1-2) ...
Errors were encountered while processing:
 apt-listchanges

Any ideas?