What steps will reproduce the problem?
1. Load Verisimilar GM and Player modules (available from wowinterface.com)
2. Follow the tutorial instructions to try to connect to the Demo session

What is the expected output? What do you see instead?

The Demo session should show up in the list of available sessions; instead, nothing does.

What version of the product are you using?

GHI 0.26 and Verisimilar 0.04

Do you have an error log of what happened?

Yes.  Here it is (as captured by BugSack and BugGrabber):

14x Unknown addon chat type:
<in C code>: ?
<in C code>: in function `SendAddonMessage'
Armory-13\Libs\ChatThrottleLib\ChatThrottleLib.lua:461 in function `SendAddonMessage'
AceComm-3.0-6 (BugSack):111: in function `Orig_SendCommMessage'
GHI-0.26\ghi_communication.lua:20 in function `SendCommMessage'
VerisimilarPlayer-0.04\VPLCommunication.lua:48 in function `SendQueryPlayer'
VerisimilarPlayer-0.04\VPLSessionPanel.lua:45 in function `OnAccept'
Interface\FrameXML\StaticPopup.lua:3407 in function `StaticPopup_OnClick':
<string>:"*:OnClick":1: in function <[string "*:OnClick"]:1>

Locals:
(*temporary) = "GHI"
(*temporary) = "^1^T^N1^SWHISPER^N2^STestchar^t^^"
(*temporary) = "VSML"
(*temporary) = "^1^T^St^Sqs^t^^"

Please provide any additional information below.

It appears that GHI's hooking of SendCommMessage is affecting Verisimilar.  Unfortunately, I don't know enough about Ace to be sure if there's something wrong in the way that Verisimilar sets up the Comm library.  I do know that I have five other addons that use versions of AceComm-3.0, but it's only with GHI turned on that this problem happens.