On my setup, the qesteidutil tool keeps throwing “empty certificates” errors dialogs whenever I click on certificates.
The utility’s dialog displays no summary of the certificate details in the footer which doesn’t correspond with the depictions of the tools that I stumbled accross on the internet. In that case don’t even bother. Do yourself a favor and install a new version of the qesteidutil tool. For NixOS, the available package happened to be outdated, so here’s what a recent qesteidutil is supposed to look like.
I’ve submitted a patch for NixOS that should be part of 17.03-small soon enough, if it gets accepted. If not, override the qesteidutil package in your custom setup or perform the changes in the qesteidutil: 22.214.171.1246 -> 126.96.36.1993 PR to quickly move past this issue.