After reviewing the logs I can say that the wtfd dosnt stop before you log out, event if the service is not in use.
So go into WTFast and use the door for logout and the error will stop.
If you are not as of "384.12" your log will be spammed with "wtfd[23517]: Could not find gpnrd pid file at /var/run/gpnrd.pid"
On a side-note, The WTFast is a major selling point for ASUS but extremely badly implemented as a "beta" with very few games on the list