I tried to edit https://wiki.restarters.net/Apple_miscellaneous but got the error message:
You do not have permission to edit this page, for the following reason:
The action you have requested is limited to users in the group: Users.
(@philip made my edits to that page)
It seems the problem is that I’m constantly logged out. Here’s how to reproduce this:
Go through the log in procedure (even ticking to keep me logged in). This works and the icon turns blue and shows an envelope beneath.
Click on the home page. Still logged in.
Click on the same page (‘Apple miscellaneous including OS X and Macs.’)
I’m logged out with the grey icon.
So I suspect the issue is one of not being logged in rather than (or maybe as well as) being a member of the Users group.