[Conkeror] Adblock Plus installation error

[A.W.]

Hey,
I'm new to Conkeror (as in, yesterday) and I'm trying to get Adblock
Plus installed. If nothing else it would cut down on the possible
hyperlinks to deal with so I don't resort to the mouse as much.

Every time I try to install I get:

because: Unexpected installation error
Review the Error Console log for more details.
-203


Where's the Error Console log?
I assume that would contain more helpful info.
Also, I'm running from the directory in which I compiled it.