Hi MajorEasy,
User Switching works on Multisite without the need to do anything special. The entry in the FAQ is just for installing it as a mu-plugin.
Is there anything unusual about your multisite configuration? For example, are you doing anything unusual with domains, cookies, or authentication?
Hi John,
Thanks for the reply mate.
Sorry but I should have updated this post.
I got an error message during switching on my first install and shortly after the site crashed. I reinstalled the multisite and now everything is working well. (I suspect it was not installed properly the first time.)
Thanks again for the great plugin and also for taking the time to reply.
Cheers mate.
I ran into the same problem and tracked it down to a conflict with one of my own plugins (the very first one that I wrote). It turns out that I was loading pluggable.php during the __construct() of my class and this was messing up the user IDs, which in turn triggered a failure of current_user_can("switch_user", $user_id).
I’ve modified my own plugin to no longer load pluggable and do what it needs to at init time, which fixed the issue.