I removed warning messages by setting APT::Sandbox::User to "root" with
cat <<EOF | sudo tee /etc/apt/apt.conf.d/99z-anti-drop APT::Sandbox::User "root";
EOF
I do not know is it secure or not. But it works as expected!
I removed warning messages by setting APT::Sandbox::User to "root" with
cat <<EOF | sudo tee /etc/apt/ apt.conf. d/99z-anti- drop
APT::Sandbox::User "root";
EOF
I do not know is it secure or not. But it works as expected!