we are using Access Control plugin for our German Editor but we are getting 404 error when we are trying to preview draft page into admin panel.
we have created a new role (German Editor) using this plugin and we have copied all capabilities from editor role type.
A fix for this is planned to be included in Toolset Access version 2.8 and though I don't have a time estimate to share at the moment, I'll update you through this ticket, once it releases.