What version of the product are you using?
r165

*IMPORTANT* -> Can you reproduce the problem when ONLY Prat is running?
I'm not sure.  I only got the error once even with other addons running.

Do you play on US or EU. What language do you use?
US

Do you have an error log of what happened?
[18:26:26] Interface\FrameXML\ChatFrame.lua:2943 attempt to index local 'editBox' (a nil value)
(tail call): ?
[C]: ?
Interface\FrameXML\ChatFrame.lua:2943 in function `ChatEdit_OnEscapePressed'
Interface\AddOns\Prat-3.0\modules\PlayerNames.lua:1370 in function `linkfunc'
Interface\AddOns\Prat-3.0\services\links.lua:102 in function <Interface\AddOns\Prat-3.0\services\links.lua:98
(tail call): ?
(tail call): ?
Interface\FrameXML\ChatFrame.lua:2454 in function <Interface\FrameXML\ChatFrame.lua:2453
[C]: ?
[C]: ?
[C]: ?
[C]: ?
[C]: ?

Please provide any additional information below.
It showed up when I logged-in.  I restarted my client to see if I will get the error again, but to no avail.