Unable to Translate from unknown to unknown

Hello… newb here. I am experiencing an error which I have no explanation for. It doesn’t appear to have any negative impact on my application, but it repeats in my messages log over and over.

I am using the current 1.4 release of * in combination with app_conference. Everything compiled, installed and runs great.

I am connecting to my system with Zoiper softphone and running some tests with dynamic conferencing.

When a party enters the conference the following message is generated:

[Jan 11 12:31:17] WARNING[21529] translate.c: No translator path from unknown to unknown

I am not sure if this is something misconfigured in *, app_conference, or the soft phone…

A push in the right direction would be greatly appreciated.