Additional information on the profile chooser error page (no executable profiles) has been added under bug 5499 and bug 8590. The text now goes more into detail what the issue might be, better guiding the user towards a solution. This technical information however likely comes across as overwhelming for regular end-users. It would be great if it was, by default, hidden by some "Show more" expander. That would also alleviate some pressure to tone down the complexity.