This has long been a problem, but I never bothered to post about it.
Install FreePBX distro like normal.
Log in as root from console/ssh and create a new user.
Add new user to wheel and asterisk
Log in as new user
You will randomly see this error.
SSH in again.
You will see the normal banner.
It will typically be days between seeing this happen, but obviously something is screwing up permissions on something somewhere.