Comment # 1 on bug 1093836 from Wolfgang Rosenauer

wolfi@Hygiea:~> rpm -q enigmail
enigmail-2.0.4-1.1.x86_64
wolfi@Hygiea:~> rpm -q gpg2
gpg2-2.0.24-8.1.x86_64
wolfi@Hygiea:~> cat /etc/os-release 
NAME="openSUSE Leap"
VERSION="42.3"

So far I've tested a few usecases and I didn't run into issues.

Not sure what is happening for you or what is specific in your error case.
Any hints?