apt-get: relocation error: /usr/lib/x86_64-linux-gnu/libapt-private.so.0.0: symbol _ZN3URIcvNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEB5cxx11Ev version APTPKG_5.0 not defined in file libapt-pkg.so.5.0 with link time reference

dpkg: dependency problems prevent configuration of libstdc++6:amd64:
     libstdc++6:amd64 depends on gcc-5-base (= 5.4.0-6ubuntu1~16.04.10); however:
      Package gcc-5-base is not installed.

dpkg: error processing package libstdc++6:amd64 (--configure):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 libstdc++6:amd64

dpkg: dependency problems prevent removal of ca-certificates:
 python-pip depends on ca-certificates.
 python3-requests depends on ca-certificates.
 python3-pip depends on ca-certificates.
 python3-httplib2 depends on ca-certificates.
 python-pip-whl depends on ca-certificates.

dpkg: error processing package ca-certificates (--purge):
 dependency problems - not removing
Errors were encountered while processing:
 ca-certificates